ThinkPad 760 / 765

7 variants of this machine type, side by side. A cell spanning several columns is shared by those models, so the narrow cells are the differences — memory type, battery chemistry and panel are what usually change across a range.

IBM model codes — 119 models of machine type 9546

Variant	Model codes
ThinkPad 760C	9546-951, 9546-952, 9546-953, 9546-A11, 9546-A1A, 9546-A21, 9546-A22, 9546-A27, 9546-A2A, 9546-A2B, 9546-A2H, 9546-C01, 9546-C02, 9546-C03, 9546-C10, 9546-C11, 9546-C12, 9546-C1A, 9546-C21, 9546-C22, 9546-C27, 9546-C2A, 9546-C2B, 9546-C2H, 9546-C50, 9546-C51, 9546-C52, 9546-CD1, 9546-CDA, 9546-CDW, 9546-E11, 9546-E1A, 9546-E21, 9546-E22, 9546-E27, 9546-E2A, 9546-E2B, 9546-E2H, 9546-F11, 9546-F1A, 9546-F21, 9546-F2A, 9546-J11, 9546-J1A, 9546-J21, 9546-J22, 9546-J27, 9546-J2A, 9546-J2B, 9546-J2H, 9546-P11, 9546-P1A, 9546-P21, 9546-P27, 9546-P2A, 9546-P2H, 9546-S11, 9546-S1A, 9546-S21, 9546-S27, 9546-S2A, 9546-S2H, 9546-U11, 9546-U1A, 9546-U21, 9546-U22, 9546-U27, 9546-U2A, 9546-U2B, 9546-U2H, 9546-Y41
ThinkPad 760E	9546-A3A, 9546-A3B, 9546-A4A, 9546-A4B, 9546-A9A, 9546-A9B, 9546-E1W, 9546-E3A, 9546-ED9, 9546-EP1, 9546-F3A, 9546-F3B, 9546-F9A, 9546-F9B, 9546-J3A, 9546-J9B, 9546-P3A, 9546-P4A, 9546-P9A, 9546-P9B, 9546-S3A, 9546-S4A, 9546-S9A, 9546-S9B, 9546-U3A, 9546-U3B, 9546-U3L, 9546-U4A, 9546-U9A, 9546-U9B, 9546-X9A, 9546-X9B
ThinkPad 760XD	9546-A9E, 9546-E9E, 9546-F9E, 9546-J9E, 9546-P9E, 9546-S9E, 9546-U9E, 9546-X9E
ThinkPad 765D	9546-A9H, 9546-F9H, 9546-J9H, 9546-P9H, 9546-S9H, 9546-U9H, 9546-X9H
Variant not recorded	9546-U4B

The system status indicators show the current computer status in different colors (green, yellow, and orange).

Symbol Color Meaning

Blinking orange Battery needs charging

normal operation

Green Power on

See > LCD Information Panel

The following table shows the Fn key and function key combinations and their corresponding functions.

The Fn key works independently from the operating system.

The operating system obtains the status through the system management interface to control the system.

Each time you press the Function key
one of the following messages (called On-Screen Message) appears at the top left corner of the LCD.

The changed values are automatically saved when you return to the TV Channel On-Screen message. The values are not saved when you power-off the TV Tuner without returning to this message.

The ThinkPad 760 and 765 series are high-end desktop replacements known for their unique tilting keyboards and powerful processors.

Use the following procedure as a guide for computer problems.

The diagnostic tests are intended to test only IBM products. Non-IBM products, prototype cards, or modified options can give false errors and invalid system responses.

1. Obtain the failing symptoms in as much detail as possible.

2. Verify the symptoms by attempting to re-create the failure by running the diagnostic test or by repeating the same operation.

   To run the diagnostics, refer to 'How to Run the Diagnostics'.

   • Use the following table with the verified symptom to determine which page to go to. Search the symptoms column and find the description that best matches your symptom; then go to the page shown in the 'Go to' column.

The servicer must include the following in the parts exchange form or part return form that is attached to the returned FRU:

1. Name and phone number of servicer.
2. Date of service.
3. Date when part failed.
4. Date of purchase.
5. Failure symptoms, error codes appearing on display, and beep symptoms.
6. Procedure index and page number in which failing FRU was detected.
7. Failing FRU name and part number.
8. Machine type, model number, and serial number.
9. Customer's name and address.

Before checking problems with the computer, determine whether or not the damage applies the warranty by referring to the following: :nt text='Note for Warranty'. During the warranty period, the customer may be responsible for repair costs if the computer damage was caused by misuse, accident, modification, unsuitable physical or operating environment, or improper maintenance by the customer. The following list provides some common items that are not covered under warranty and some symptoms that may indicate the system was subjected to stresses beyond normal use:

The following is not covered under warranty:

• LCD panel cracked by applying excessive force or by being dropped.
• Scratched (cosmetic) parts.
• Cracked or broken plastic parts, broken latches, broken pins, or broken connectors caused by excessive force.
• Damage caused by liquid spilled into the system.
• Damage caused by improperly inserting a PCMCIA card or installation of an incompatible card.
• Damage caused by foreign material in the FDD or UltraBay.
• Diskette drive damage caused by pressing the diskette drive cover or inserting diskettes with multiple labels.
• Damaged or bent diskette eject button.
• CD-ROM drive damage caused by excessive forces shock, or by being dropped.
• Fuses blown by attaching a nonsupported device.
• Forgotten computer or hard disk password. (making computer or hard disk unusable.)

If the following symptoms are present, they may indicate damage caused by non-warranted activity:

• Missing parts may be a symptom of unauthorized service or modification.
• HDD spindles can become noisy if subjected to excessive force or by being dropped.
• I9990303 errors can be caused by exposure to strong magnetic fields.

Before you go to the checkout guide, be sure to read this section.

Important Notes

• Only certified trained personnel should service the computer.

• Read FRU service procedures* before replacing any FRUs.

  • Be extremely careful during write operations such as copying, saving, or formatting. Drives in the computer that you are servicing might have been rearranged or the drive startup sequence might have been altered. If you select an incorrect drive, data or programs can be written over.
  • Replace FRUs only for the correct model. When you replace the FRU, make sure the model of the machine and FRU part number are correct by referring to the part list.
  • FRUs should not be replaced because of a single, un-reproducible failure. Single failures can occur from a variety of reasons that have nothing to do with a hardware defect such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be considered only when a recurring problem exists. If this is suspected, clear the error log and run the test again. Do not replace any FRUs if log errors do not reappear.
  • Be careful not to replace a non-defective FRU.

How to Use Error Messages

Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed, begin the diagnosis with the first error code. The cause of the first error code can result in false error codes being displayed. If no error code is displayed, see if the error symptom is listed in the 'Symptom-to-FRU Index'.

Port Replicator Problems

If you suspect a problem with the Port Replicator, see 'Port Replicator Checkout' in the Common Devices Checkout section for more information.

How to Diagnose Multiple FRUs

If the adapter or device has more than one FRU, the error code could be caused by either FRU. Before replacing multiple FRUs, try removing or exchanging each FRU, one by one in the designated sequence, to see if the symptoms change.

ThinkPad Common Parts List

Remove the external keyboard if the internal keyboard is to be tested.

If the internal keyboard does not work or an unexpected character appears, make sure that the flexible cable extending from the keyboard is correctly seated in the connector on the video card.

If the keyboard cable connection is correct, check the DSP card (see DSP Card Checkout or Audio Card (ESS) card (see Audio (ESS) Card Checkout).

If the tests do not detect a keyboard problem, run the Keyboard Test by doing the following:

1. Go to the diagnostic menu screen by selecting Test in the Easy-Setup menu.
2. Press Ctrl+A to enter to the advanced diagnostic mode.
3. Press Ctrl+K, a layout of the keyboard appears on the screen.
4. Check that when each key is pressed, the key's position on the keyboard layout on the screen changes to a black square.NOTE: When the Fn key is pressed, a black square briefly appears.

If the tests detect a keyboard problem, do the following one at a time to correct the problem. Do not replace a nondefective FRU.

• Reseat the keyboard card cable.
• Replace the keyboard card cable.
• Replace the keyboard card assembly.
• Replace the video card.
• Replace the system board.

The following auxiliary input devices are supported for this computer:

• Numeric keypad
• Mouse (PS/2 compatible)
• External keyboard (with keyboard/mouse cable)

If any of these devices do not work, reseat the cable connector and repeat the failing operation.

If the problem does not occur again, recheck the connector.

If the problem is not corrected, replace the device, and then the system board.

(Models 760L/760LD/760EL/760ELD)

1. Go to the diagnostic menu screen by selecting Test in the Easy-Setup menu.
2. Select Audio and run the diagnostic tests.
3. If the test detects a audio (ESS) card problem, replace the audio (ESS) card.

If the TrackPoint III will not work, check the configuration in the ThinkPad Features program. If the configuration of the TrackPoint III is disabled, select Enable to enable it.

If this does not correct the TrackPoint III problem, continue with the following.

The TrackPoint III does automatic compensations to adjust the pointer sensor. During this process, the pointer moves on the screen automatically for a short time. This self-acting pointer movement can occur when a slight, steady pressure is applied to the TrackPoint III pointer while the computer is powered on or while the system is running, or when readjustment is required because the temperature has exceeded its normal temperature range. This symptom does not indicate a hardware problem. No service actions are necessary if the pointer movement stops in a short period of time.

If a click button problem or pointing stick problem occurs, do the following:

1. Go to the Easy-Setup menu.
2. Select an item with the pointing stick.
3. Press either the left or right click button.
4. Verify that both buttons work correctly.

If either the pointing stick or the click button does not work, do the following actions one at a time to correct the problem. Do not replace a nondefective FRU.

• Reseat the keyboard card cables.
• Replace the keyboard card cables.
• Replace the keyboard card assembly.
• Replace the video card.
• Replace the system board.

Do the following to isolate the problem to a controller, drive, or diskette. A scratch, write enabled, nondefective 2HD diskette is required.

FDD-1 represents the diskette drive in the UltraBay.

FDD-2 represents the port replicator, expansion unit, or diskette drive attached through the external diskette drive connector.

Make sure that the diskette does not have more than one label attached to it. Multiple labels can cause damage to the drive, or can cause the drive to fail.

Do the following to select the test device:

1. Select the advanced diagnostics mode and select Tool, then select FDD-1 or FDD-2 and press the Spacebar. A OK mark appears next to the selected icon. Insert the blank diskette when instructed.
2. Run the diskette drive test.
3. If the controller test detects an error, FRU code 10 appears. Replace the system board.
4. If the controller test runs without errors, the drive read/write tests start automatically.
5. If the drive test detects an error, FRU code 50 for FDD-1 or 51 for FDD-2 appears. If the diskette itself is known to be good, replace the drive.
6. If FDD-2 test detects an error, move the drive to the computer's diskette drive connector directly, if possible, and test it again as FDD-1.If no errors occur in the FDD-1 position, the drive is not defective. Go to 'Port Replicator Checkout' in 'Common Devices Checkout' section to isolate the replicator problem. - If the drive is attached through an Expansion Unit, go to the service manual of the Expansion Unit to isolate the problem.
7. If the drive is attached through a Diskette Drive Attachment Unit, replace the unit.

If an error occurs when the external diskette drive is attached through the external diskette drive connector and there is not a diskette drive in the UltraBay, reseat the connector on the video card. If the error still remains, reseat the external diskette drive connector. If the error still remains, replace the following FRUs one at a time:

1. External diskette drive kit
2. Video card
3. External diskette drive connector

The green LED on the PC test card turns on when the PCMCIA test is running.

If the LED does not turn on, check that the card is installed correctly by reseating the card. If it still does not turn on after it is reseated, try using another slot for the test. If the LED still does not turn on and the test fails, replace the FRU shown by the diagnostic error code.

Use the following procedure to isolate the diskette problem to a controller, drive or diskette. A scratch, write-enabled 2HD diskette is required.

1. Select the icon FDD on the TEST MENU . By doing this, the controller test and the drive read/write test run. If the controller test detects an error, FRU code 10 appears. In this case, replace the system board.
2. If the controller test run without errors, follow the instructions on the screen and insert a scratch diskette.
3. If the drive test detects an error, FRU code 50 appears. If the diskette media are known to be good, replace the drive or the drive cable.

The following auxiliary input devices may be available for IBM ThinkPad models.

• Numeric keypad
• Mouse (PS/2 compatible)
• External keyboard (with Keyboard/Miniature Mouse cable)

• If you suspect a problem with any of the auxiliary input devices (listed above), replace the device.

If the problem is not corrected, replace the following FRUs one at a time to correct the problem.

• Keyboard control card
• System board

• If the computer receives an incorrect keyboard response, remove other external devices, check the keyboard connections, and recheck the keyboard responses. If the problem remains, replace the following FRUs one at a time to correct the problem.

  • Keyboard
  • Keyboard control card
  • System board

  • If a 00030100 error message appears, power-off the computer and the external devices. Then power-on the computer before you power-on the external devices.

1. Make sure the printer is correctly connected and is powered-on.
2. Run the printer self-test.

If the printer self-test does not run correctly, the problem is in the printer. Refer to the printer service manual.

If the printer self-test runs correctly, do the following.

1. Verify the port settings in configuration.
2. Install a wrap plug on the port (indicated in configuration) and run the advanced diagnostic tests.
3. If the advanced diagnostic tests (with the wrap plug installed) do not detect a failure, replace the printer cable. If the problem is not corrected, replace the system board.

Use the following procedure to isolate a port replicator problem. A port replicator attaches to the system expansion connector at the rear of the computer.

1. Power-off the computer.
2. Remove the failing devices from the replicator.
3. Unplug the AC adapter from the replicator, if attached.
4. Remove the port replicator from the computer.
5. Reconnect the failing device directly to the computer. (If another device occupies the connector, remove it first.)
6. Go to General Checkout and follow that procedure.
7. If the advanced diagnostic device test does not find an error, suspect a problem with the port replicator or the system expansion bus.
8. Power-off the computer and reconnect the port replicator.
9. Power-on the computer and run the following advanced diagnostic tests:
   • Serial port test with the wrap plug installed on the replicator.
   • Parallel port test with the wrap plug installed on the replicator.
   • PCMCIA-2 test with the PC test card installed.
   • FDD-2 (FDD-1 if no drive is installed in the computer) drive test on the failing device. - If diagnostic errors appear, replace the replicator or diskette drive attachment unit. If the problem remains after the replacement, replace the system board. - If power problems appear only when using the replicator, replace the replicator.

If power shut downs occur intermittently when using PCMCIA-2 devices via a port replicator, suspect an over-current problem. Some PCMCIA devices use more power; if the maximum usage of each device occurs simultaneously, the total current will exceed the limit, thereby causing a power shut down. Isolate this problem by removing one of the devices, and use the computer under the same condition, and see whether a power shut down occurs. Do this procedure for all devices then determine the cause.

Customer purchase of the larger AC adapter (50W, optional) is recommended, if it is not yet in use.

• If the TrackPoint II does not work, check the configuration. If the configuration of the TrackPoint II is set to Disabled or Off, change it to Enable or On.

If the problem remains, continue.

NOTE: TrackPoint II automatically compensates to adjust the pointer sensor. This causes the pointer to move slightly on the screen and then stop. Pointer movement might occur when a slight, steady pressure is applied to the TrackPoint II pointer when the computer is powered-on or running, or when exceeded temperature range requires re-adjustment.

• If the cursor floats or moves erratically, power-off and disconnect the mouse. Power-on the computer. If the problem goes away, replace the mouse. If the problem remains, replace the keyboard.

  For click button or pointing stick problems:

  1. Go to the Easy-Setup screen.
  2. Select an item with the pointing stick.
  3. Press either left or right click button.
  4. Verify that both buttons work correctly.

  If the pointing stick or the click button does not work, do the following.

  1. Reseat the keyboard cables.
  2. Replace the keyboard.
  3. Replace the interposer card (355x, 360x, 750x, 755x).
  4. Replace keyboard control card (720).
  5. Replace the system board.

DIMM cards are available for increasing memory capacity.

Models 760C/760CD/760L/760LD

Models 760E/760ED/760EL/760ELD

Memory errors might stop system operations, show error messages on the screen, or hang the system.

Use the following procedure to isolate memory problems:

NOTE: Make sure that the DIMM adapter card is fully installed into the connector. A loose connection can cause an error.

1. Power-off the computer and remove the DIMM adapter card from its slot (if installed).
2. Press and hold the F1 key; then power-on the computer. Hold the F1 key down until the Easy-Setup screen appears.
3. Select Test and press Enter .
4. Select Memory and press Enter to run the memory test on base memory. If an error appears, replace the system board.
5. Power-off the computer and reinstall the DIMM adapter card; then power-on the computer. Verify the memory size; then test the memory. If an error appears, replace the DIMM adapter card.

If memory problems occur intermittently, use the loop option to repeat the test. When the test detects an error, an error log is printed on the printer connected to the parallel port. See 'Error Log' for more information.

The processing functions are performed by both the system board and the CPU card. Processor problems can be caused by either FRU. However, the CPU card generally has a lower probability of failure. When a numeric code calls the system board or the CPU card as a FRU, or the CPU card is called by a diagnostic test by showing FRU code 11, use the following procedure to isolate the problem:

1. Run the system board test to verify the symptom. This test verifies both the system board and the CPU card. If no error is detected, return to 'Checkout Guide'.

NOTE: Don't touch the keyboard and pointing device when the system board test is running. This may cause an unexpected error.

• If FRU code 10 appears, replace the system board but do not replace the CPU card. Transfer the CPU card from the old system board to the new system board.

  • If FRU code 11 appears, reseat the CPU card.
  • Rerun the test to verify the fix.
  • If FRU code 11 remains, replace the CPU card.

If this procedure does not correct the problem, go to 'Undetermined Problems'.

(Models 760C/760CD/760E/760ED)

1. Go to the diagnostic menu screen by selecting Test in the Easy-Setup menu.
2. Select DSP and run the diagnostic tests.
3. If the test detects a DSP card problem, replace the DSP card.

Do the following if a joystick problem occurs:

1. Connect the joystick to the game port.
2. Go to the Easy-Setup menu.
3. Select an item with the joystick.
4. Press any button of the joystick.
5. Verify that all buttons work correctly.

If either the joystick or a button does not work, replace the video board. If the problem still remains, replace the system board.

If an LCD information panel problem occurs, do the following:

1. Power-off the computer.
2. Power-on the computer.
3. All the icons in the LCD information panel appear for a moment soon after the computer is powered-on. Verify that all icons appear correctly. If some of the icons do not appear, replace the keyboard.

If the problem still remains, replace the video card.

If a device is installed but the icon appears in a gray shade rather than a dark shade on the basic diagnostics screen, the device is defective. Reseat the device connectors. If the symptom remains, replace the device or the system board. If needed, adjust the contrast control to clearly distinguish the shades of the icon.

If a device that is not installed appears in a dark shade (for example, FDD-2 appears in a dark shade when no second FDD is installed), do the following:

1. Replace the first device in the configuration, such as an FDD-1, an HDD-1, or a PCMCIA-1.
2. If the problem remains, replace the system board.

The PCMCIA-1, Parallel, and Serial icons are always displayed in a dark shade because the icons represent subsystems of the system board and not the attachment of the devices.

The FDD-1, HDD-1, or PCMCIA-1 icons represent the first drive in the system configuration for each type of device.

Similarly, the FDD-2 or PCMCIA-2 icons represent the second drive, usually attached through a port replicator or an expansion unit. The HDD-2 icon represents the hard disk drive in the UltraBay.

The HDD-3 and HDD-4 icons represent the hard disk drive, attached through an expansion unit.

The power shutdown switch resets the system regardless of the microcode status and forces the power off. Use this push button to power-off when power is not completely off or the microcode is in a hung state.

See 'Rear View' for the power shutdown switch.

You are here because the computer fails only when the AC Adapter is used.

• If the power problem occurs only when the port replicator is used, replace the replicator.
• If the power-on indicator does not turn on, check the power cord of the AC Adapter for correct continuity and installation.
• If the operational charge does not work, go to 'Checking Operational Charging' .

NOTE: For Model 760CD, 760ED, 760LD, and 760ELD, there are two types of adapters. The procedure for checking both types is the same.

1. Unplug the AC Adapter cable from the computer and measure the output voltage at the plug of the AC Adapter cable.

(20 - 10 V)

(16 - 10 V)

• If the voltage is correct, make sure the connection between DC/DC card and system board is not loose.
• Replace the DC/DC card.
• If the problem is not corrected, replace the system board.
• If the problem is still not corrected, go to 'Undetermined Problems' .
• If the voltage is not correct, go to the next step.
• Unplug the AC Adapter cable from the ac power outlet and wait five minutes or longer to allow the over-voltage protection circuit to be fully discharged and initialized.
• Plug the AC Adapter cable into the ac power outlet.
• Measure the output voltage of the AC Adapter.
• If the voltage is still not correct, replace the AC Adapter.

NOTE: An audible noise from the AC Adapter does not always indicate a defective adapter.

To check operational charging, use a discharged battery pack or a battery pack that has less than 50% of the total power remaining when installed in the computer.

Perform operational charging. If the battery status indicator does not turn on, remove the battery pack and leave it to return to room temperature. Reinstall the battery pack. If the charge indicator still does not turn on, replace the battery pack.

Battery charging will not start until the Fuel-Gauge shows that less than 95% of the total power remains; with this condition the battery pack will charge to 100% of its capacity. This protects the battery pack from being overcharged or having a shortened life.

Do the following:

1. Power-off the computer.

2. Remove the battery pack and measure the voltage between battery terminals 1 (+) and 4 (-).

   

   Terminal	Voltage (Vdc) / Signal
   1	+0 to +13.5
   2	Send
   3	Thermal
   4	Ground (-)
   5	Select

   NOTE: Signal lines, not used in these steps, are used for communication between the system and the battery.

   If the voltage is less than +11.0 Vdc, the battery pack has been discharged. Recharge the battery pack.

   • If the voltage is still less than +11.0 Vdc after recharging, replace the battery.

   NOTE: If the voltage of the battery pack is 0 V, it is not defective.

   • If the voltage is more than +11.0 Vdc, measure the resistance between battery terminals 3 and 4. The resistance must be 4 to 30 K ohm.

If the resistance is not correct, replace the battery pack.

If the resistance is correct, replace the DC/DC card.

1. Unplug the Car-Battery Adapter cable from the computer.

2. Plug the Car-Battery Adapter into the cigarette lighter socket.

   NOTE: If the adapter is already plugged in, reseat it.

   • Measure the output voltage of the Car-Battery Adapter cable.

   

   Pin	Voltage (Vdc)
   1	+19.0 to +21.0
   2	Ground

   • If the voltage is correct, the Car-Battery Adapter is working correctly. Check that the computer runs with the AC Adapter.

     If it runs correctly with the AC Adapter, check the system board.

     If the problem still remains, replace the following FRUs one at a time.

     1. DC/DC card
     2. System board

     • If the problem is not resolved when the system board is replaced, go to 'Undetermined Problems'.

     • If the voltage is outside the normal voltage range, do one of the following:

       • Try these test procedures in a different car, if one is available.
       • Replace the Car-Battery Adapter if the computer works correctly with the AC Adapter.

NOTE: If the output voltage from the cigarette lighter socket of the car is less than 10.5 Vdc, a continuous noise may be heard. The condition of the car battery should be checked by appropriate service personal.

1. Power-off the computer and unplug the AC Adapter from the computer.
2. Open the keyboard, and remove the diskette drive/CD-ROM drive, the battery pack, and the hard disk drive.
3. Remove the top cover and keyboard unit.
4. Open the keyboard unit, then remove the keyboard card.
5. Remove the backup battery from the keyboard card. (Refer to 'Backup Battery, Speaker, Standby Battery' to remove the battery.)
6. Measure the voltage of the backup battery. See the following figure:

• If the voltage is correct, replace the system board.
• If the voltage is not correct, the backup battery has been discharged. Replace the backup battery.
• If the backup battery discharges quickly after replacement, replace the system board.

1. Power-off the computer and unplug the AC Adapter from the computer.
2. Open the keyboard, remove the diskette drive/CD-ROM drive, the battery pack, and hard disk drive.
3. Remove the top cover and keyboard unit.
4. Open the keyboard unit and remove the keyboard card.
5. Remove the standby battery from the keyboard card. (Refer to 'Backup Battery, Speaker, Standby Battery' to remove the battery.) Be careful **not to cause a short circuit when measuring the voltage.** - Measure the voltage of the standby battery. - If the voltage between red and black is 3.5 Vdc or greater, the voltage is correct. Go to step 12 to verify standby battery operation. - If the voltage is less than 3.5 Vdc, go to the next step. - Plug the AC Adapter into the computer and power-on the computer. - Measure the output voltage at the connector on the system board. | Pin | Voltage (Vdc) | | --- | --- | | + | +4.0 | | - | Ground | - If the voltage is less than +4.0 Vdc, replace the DC/DC card. If the voltage is still low, replace the system board. - If the voltage is more than +4.0 Vdc, power-off the computer, replace the standby battery, and go to the next step. - Ensure that the AC Adapter is plugged into the computer, then power-on the computer. - Charging of the standby battery starts. A depleted battery needs approximately 30 minutes to be recharged to the operational voltage of +3.5 Vdc. - Unplug the AC Adapter. - Verify the standby battery function by removing and installing the battery pack during suspend mode. NOTE: Removing and installing the battery pack during suspend mode should be done within one minute. The resume operation must start. If the resume operation does not work, switching of power from the battery pack to standby battery will not be correct. Replace the DC/DC card. If replacing the DC/DC card does not resolve the problem, replace the system board.

Three power management modes are provided by the computer to reduce power consumption and prolong battery power.

Standby Mode

When in standby mode the following occurs:

• The LCD backlight turns off.
• The hard disk motor stops.

Events that cause the computer to enter standby mode:

• Standby requested by the Fn key ( Fn+F3 ).
• No activity under auto-standby enabled by the ThinkPad Features program.

Events that cause the computer to exit or resume standby mode:

• (Resume) Any key operation.

Suspend Mode

When in suspend mode, the following, in addition to the four actions of standby mode, occur:

• The LCD is powered off.
• The hard disk is powered off.
• The CPU is stopped.

NOTE:

1. In the ThinkPad Features program, the computer can be set to 'Will not suspend even if LCD is closed'.
2. In the ThinkPad Features program, the computer can be set to 'suspend hibernate while docked'.
3. When the computer is powered with ac power and is used with one of the communication PC cards, the computer enters standby mode, the PC card and application program remain active.
4. In the following conditions, the computer cannot enter suspend mode:
   • While a communication link is running.
   • While the computer is attached to a Dock I.

Events that cause the computer to enter suspend mode:

• Suspend mode is requested by the Fn key ( Fn+F4 ).
• The LCD is closed.
• The keyboard is opened.
• The specified time has elapsed from the last operation with the keyboard, mouse, hard disk drive, parallel connector, or diskette drive, or the AC Adapter is plugged in. The time is specified by Suspend Timer in the ThinkPad Features program.
• The battery condition is low. The battery power indicator blinks orange.
• In the ThinkPad features program, the computer can be set to Hibernate when battery becomes low. The default setting is suspend.
• Either the PS2 OFF or PS2 SUSpend command is set in the ThinkPad Features program.

Events that cause the computer to exit or resume suspend mode:

• (Resume) The LCD is opened.
• (Resume) The keyboard is closed.
• (Resume) The real time clock alarm is signaled.
• (Resume) The ring indicator (RI) is signaled by a serial or PCMCIA device.
• (Resume) The Fn key is pressed.
• (Resume) An external keyboard key is pressed while operating with ac power.
• (Exit) Timer conditions are satisfied for entering hibernation mode.

Hibernation Mode

When in hibernation mode, the following occurs:

• The system status, RAM, VRAM, and setup data are stored on the hard disk.
• The system is powered off.

NOTE:

1. In the ThinkPad Features program, the computer can be set to suspend hibernate while docked.

2. The computer cannot enter hibernation mode when:

   • It is powered with ac power and a communication PC card is used.
   • The computer is attached to a Dock I.

Any of the following events can cause the computer to enter hibernation mode:

• Hibernation mode is requested by the Fn key ( Fn+F12 ).
• Timer conditions are satisfied in suspend mode.
• A critical low battery condition occurs.
• The PS2 HIBernation command is set in the ThinkPad Features program.

The following event causes the computer to exit hibernation mode:

• The power-on switch is turned on.

When power is turned on, the hibernation history in the boot record on the hard disk is recognized and system status is restored from the hard disk to resume operation.

If power shutdowns occur intermittently when using PCMCIA-2 devices via a port replicator, suspect a current overload. Some PCMCIA devices use much power, if the maximum usage of each device occurs simultaneously, the total current will exceed the limit, thereby causing a power shutdown. Isolate this problem by removing one of the devices, and use the computer under the same condition to see whether a power shutdown occurs.

Do this procedure for all devices, then determine the cause.

Use the ThinkPad Features program or PS2.EXE. to power-on the TV Tuner, then power-on the internal device in the diskette drive compartment.

If power for the internal device is turned off when the TV Tuner is set up, nothing appears on the LCD display. Turn on power for the TV Tuner again.

• If you are using DOS, do one of the following:

• Power-on the computer and type PS2 from the command prompt to start the ThinkPad Features program. Select Set Power Features from the ThinkPad Features menu,then put a check mark at Internal Serial Port (or Diskette Drive Compartment ) under the Power for devices . If you need help, press F1 to display the help menu.
• Type ps2 modem on from the command prompt, press the Enter key to set the power ON.

• If you are using OS/2 or Microsoft Windows, do the following:

  1. Power-on the computer and start the ThinkPad Features program.
  2. Select the Power icon, then move the pointer to Internal Serial Port (or Diskette Drive Compartment ) under the Power for devices and click the button to check mark it.
  3. Press the OK button.

Use either the TrackPoint III or the cursor move keys to interact with the tests. The Enter key works the same as selecting the OK icon to reply OK.

1. Press and hold the F1 key, then power-on the computer. Hold the F1 key down until the Easy-Setup screen appears.
2. Select Test and press Enter.
3. Select a device and press Enter to run the test.
4. The test progress screen appears.
5. OK appears when the test ends without any errors.
6. Start the Advanced Diagnostic test by pressing Ctrl+A on the basic diagnostic menu screen.
7. Select Tool to install the tools.

   NOTE: The following tools are required.
   - FDD: Erasable 2HD diskette
   - Parallel: Wrap plug (P/N 72X8546)
   - Serial: Wrap plug (P/N 72X8546)
   - PCMCIA: PC Test Card (P/N 35G4703)
   - CDROM: Any CD (data CD is recommended)

8. Select a device, press the Spacebar, and install the tool. Multiple devices can be selected by repeating this step. A OK mark appears beside the selected devices.
9. Select OK and press Enter if the selection is OK.
10. Select a device and press Enter to start the tests.

    NOTE: Don't touch the keyboard and pointing device when the system board test in running. This may cause an error.

11. Select Test All to test all devices.
12. Select Loop Test to run the tests in a repeated loop. A loop option menu appears where you can select a device loop or all-device loop. Select a device by pressing the Spacebar. Repeat this step to select multiple devices. Press Enter to start the diagnostic loop. If no device is selected, all device tests are looped.
13. To exit the loop, keep pressing Ctrl+Pause until the test exits. A beep sounds to notify that the exit interrupt is sensed by the test program.

If the display problem occurs only when using an external display, use the following instructions to correct the problem.

Note: Before you replace a display, check the following list to see if it is connected correctly.

• 8506 and 8508 displays must be connected to an Image Adapter/A or an Image-I Adapter/A.
• 63XX and 85XX systems support either 63XX or 85XX displays.
• 85XX systems with an XGA-2 adapter support 95XX displays.
• 95XX systems support either 63XX, 85XX, or 95XX displays.
• ThinkPad models support either 85XX or 95XX displays.

If the screen is rolling, replace the display assembly. If that does not correct the problem, replace FRUs in the following order until the problem goes away:

1. Video card
2. Display adapter (any type)
3. System board
4. Bus adapter (if used)

If the screen is not rolling, run the display self-test as follows:

1. Power-off the computer and display.
2. Disconnect the display signal cable.
3. Power-on the display.
4. Set the contrast to its maximum position.
5. Set the brightness control to the center detent position.

Check for the following conditions:

• You should be able to vary the screen intensity by adjusting the contrast and brightness controls.
• The screen should be white or light gray, with a black margin (test margin) on the screen. NOTE: The location of the test margin varies with the type of display. The test margin might be on the top, bottom, or one or both sides.

If you do not see a test margin on the screen, replace the display. If there is a test margin on the screen, replace the system board.

On ThinkPad Models 700, 700C, 720C, 720C, do the following:

1. Video card
2. System board

Do the following to format the hard disk.

Make sure the address of the drive to be formatted is correct. This procedure erases all information on the disk.

1. Power-off the computer.

2. Insert the ThinkPad Hardware Maintenance Diskette Version 1.20 into diskette drive A and power-on the computer.

   NOTE: You can use this maintenance diskette for any ThinkPad model.

   • Select Format the hard disk from the main menu.
   • Select the drive from the menu.
   • Follow the instructions on the screen.

Symptom-to-FRU Index

The Symptom-to-FRU Index lists the symptoms and errors and the possible causes. The most likely cause is listed first.

NOTE: Perform the FRU replacement or actions in the sequence shown in the 'FRU/Action in Sequence' column. If a FRU did not solve the problem, put the original part back in the computer. Do not replace a nondefective FRU.

This index can also be used to help you decide which FRUs to have available when servicing a computer.

Numeric error codes show the errors detected in POST or system operation. In the following error codes, X can be any number.

• If no codes are available, use narrative symptoms.
• If the symptom is not listed, go to 'Undetermined Problems' .

NOTE: For IBM devices not supported by diagnostic codes in the ThinkPad notebook computers, see the manual for that device.

For see > Numeric Error Codes

Important

The LCD for the notebook computer contains over 921.000 thin-film transistors (TFTs). A small number of missing, discolored, or lighted dots (on all the time) is characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number of missing, discolored, or lighted dots in any background is 21 or more.

NOTE: If you cannot find a symptom or error in this list and the problem remains, see 'Undetermined Problems'.

You are here because the diagnostic tests did not identify which adapter or device failed, installed devices are incorrect, a short circuit is suspected, or the system is inoperative. Follow the procedures below to isolate the failing FRU (do not isolate nondefective FRUs).

Verify that all attached devices are supported by the computer.

Verify that the power supply being used at the time of the failure is operating correctly.

(See 'Power Systems Checkout'.)

1. Power-off the computer.

2. Check the cables, wires, and connectors for short circuits and open circuits. Visually check them for damage. If any problems are found, replace the FRU.

3. Remove or disconnect all of the following devices:

   1. Non-IBM devices
   2. Devices attached to the expansion bus connector
   3. Printer, mouse, and other external devices
   4. Battery pack
   5. Hard disk drive
   6. Diskette drive/CD-ROM drive or the device attached in the UltraBay.
   7. DIMM card
   8. PC Cards
   • Power-on the computer.
   • Determine if the problem has changed.
   • If the problem does not occur again, reconnect the removed devices one at a time until you find the failing FRU.
   • If the problem remains, replace the following FRUs one at a time. Do not replace a nondefective FRU.
     • DC/DC card
     • Video card
     • Keyboard card
     • LCD assembly
     • System board
     • DSP card or audio (ESS) card
     • CPU card

See > Status Indicators

The LCD information panel shows the current computer status using these icons:

Icon Meaning

Speaker

Remaining battery

Secondary battery status

Main battery status

Diskette drive in-use

Hard disk in-use

Numeric lock

Caps lock

Scroll lock

Diagnostic errors are printed on the printer that is attached to the parallel port when the error is detected. The error is also logged in the system memory.

Do the following to display the errors.

1. End the test, if it is running.
2. Press Ctrl+A to select the advanced diagnostic mode.
3. Press Ctrl+E .
4. The error log appears.
5. To exit the screen, select the cancel icon or press Esc .

The error log is not saved when the system is powered-off.

The following table shows what to do to solve problems when the TV Tuner does not work correctly.

Problem Probable Cause
The TV Tuner ° Computer is not powered on.
does not operate. ° Computer is in suspend mode.
(No picture ° Volume control of the TV Tuner or computer
or sound) is not adjusted correctly.
° The power for the TV Tuner is not supplied.
(See Power-on the TV Tuner)
° The wall outlet from the outdoor antenna is not active.
° The video or antenna cable is not connected correctly.
° Antenna elements of the active antenna unit are not adjusted.
° The batteries in the active antenna unit are not inserted
correctly.
° The batteries in the active antenna unit are depleted.
° The TV Tuner is not set up correctly.
° You cannot watch TV or videos on the external display.
° LO is set for the auto tune sensitivity
selection.
No color. ° The program is not in color.

Snow and noise ° Switch the TV/EXT ( ) button.
only.
Pictures are out For TV:
of shape, or have ° The channel is not tuned correctly.
double images. ° Adjust the antenna.
For VCR:
° Change the tracking adjustment.
Dotted lines ° Usually caused by interference from
or stripes. neon signs, hair dryers, and so on.
Move the computer to avoid the interference.
Picture control ° Do not power-off the TV Tuner
are not saved. when adjusting functions such as picture control,
color, tint, brightness, or contrast.
Channel number is ° Select your favorite mode for the on-screen message.
always displayed or
is not displayed.

Numeric Error Codes

If an error is detected by the diagnostic tests, a four-digit FRU code is displayed. The FRU code indicates two suspected FRUs. Replace the FRU that is indicated by the two leftmost digits first, then replace the FRU indicated by the two rightmost digits.

No FRU is assigned to code 00.

If only one FRU is suspected, the other FRU code is filled with zeros. See the page referred to before replacing the FRU.

NOTE: The device ID and error codes are used to indicate the detail portion of the FRU which caused the error. If replacing a FRU does not correct a problem, see the device ID or error code from the previous failure. If they have changed, the cause might be because the new FRU is defective or that the FRU was incorrectly installed.

If the problem remains after replacement of the FRUs, go to 'Undetermined Problems'.

Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU replacement should only be considered when a recurring problem exists.

When analyzing the intermittent problem, do the following:

1. Run the advanced diagnostic test for the system board in loop mode at least 10 times.
2. If no error is detected, do not replace any FRUs.
3. If any error is detected, replace the FRU shown by the FRU code . Rerun the test to verify that there are no more errors.

FRU Removals and Replacements

This section contains information about removals and replacements.

• Do not damage any parts. Only certified and trained personnel should service the computer.
• The arrows in this section show the direction of movement to remove a FRU, or to turn a screw to release the FRU. The arrows are marked in numeric order, in square callouts, to show the correct sequence of removal.
• Any FRUs that must be removed before removing the failing FRU are listed at the top of the page.
• To replace a FRU, reverse the removal procedure and follow any notes that pertain to replacement. See 'Locations' for internal cable connections and arrangement information.
• When replacing a FRU, use the correct screw size, as shown in the procedure.

Before the computer is powered-on after FRU replacement, make sure all screws, springs, or other small parts, are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short circuits.

The battery pack contains small amounts of nickel. Do not disassemble it, throw it into fire or water, or short-circuit it. Dispose of the battery pack as required by local ordinances or regulations.

Before removing any FRU*, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, and then disconnect any interconnecting cables.

LCD Removal and Replacement

This section discusses removal and replacement procedure for the LCD unit of the ThinkPad 760 series. After removing the LCD unit, check its part number, then go to the appropriate section:

• P/N 29H9226 (12.1 SVGA)

There are two types of LCDs with the part number 29H9226. They differ in the location of the brightness control slide knob:

• ASM P/N 29H9029 LCD Unit, 12.1 SVGA

• ASM P/N 73H6599 LCD Unit, 12.1 SVGA

• P/N 29H9227 (10.4 SVGA) LCD Unit, 10.4 SVGA
• P/N 46H5355 (10.4 VGA) LCD Unit, 10.4 VGA
• P/N 39H6232 (11.3 SVGA) LCD Unit, 11.3 DSTN
• P/N 82H8486 (12.1 XGA) LCD Unit, 12.1 XGA
• P/N 82H8496 (12.1 SVGA) LCD Unit, 12.1 SVGA

• Diskette Drive/CD-ROM Drive (Model Unique)

Be careful that the computer does not fall backward when the battery pack is removed.

When pulling the lever off the foot 1, separate the lower part of the lever from the foot by inserting a pointed device through the hole in the foot.

NOTE: When removing the latch from the keyboard base 6, push both ends of the latch simultaneously.

When replacing the keyboard cable, place the cable correctly, as shown by the picture in the circle.

Model Unique

NOTE: When replacing the keyboard, affix the model number label.

When replacing the keyboard unit, connect the keyboard connector as shown in the figure, then replace the keyboard.

When pulling the lever off the foot 1, separate the lower part of the lever from the foot by inserting a pointed device through the hole in the foot.

Remove the center latch 1, then remove the rear connector door by flexing it 2.

Screws shipped with PCMCIA

• Diskette Drive/CD-ROM Drive (Model Unique)
• Battery Pack

Do not drop or apply any shock to the hard disk drive. The hard disk drive is sensitive to physical shock. Incorrect handling can cause damage and permanent loss of data on the hard disk. Before removing the hard disk drive, have the user make a backup copy of all the information on the hard disk. Never remove the hard disk drive while the system is operating or is in suspend mode.

Remove the hard disk drive exactly as shown in the figure. Do not apply any extra force to the hard disk drive when removing it.

NOTE: After replacing the hard disk drive, latch the removal strap into the correct position.

When installing the DIMM, do the following:

1. Find the notch 1 on the side of the DIMM.
2. With the notched end of the DIMM toward the right side of the socket 2 , insert the DIMM, at an angle of approximately 20°, into the socket, then press it firmly.
3. Pivot the DIMM until it snaps into place.

• Diskette Drive/CD-ROM Drive (Model Unique)
• Battery Pack (760C/760L/760E/760EL)
• Hard Disk Drive

When replacing the top cover, be careful not damage the resume switch shown in the figure.

• Diskette Drive/CD-ROM Drive (Model Unique)
• Battery Pack (760C/760L/760E/760EL)
• Hard Disk Drive
• Top Cover
• Keyboard Unit
• LCD Assembly
• Front IR and Rear IR

NOTE: In step 1,

gently pushing the area ,

lift the switch cover halfway up ,
as shown.

Then pull the switch lever out to remove

NOTE: In step 5, gently push the levers to avoid flexing them.

NOTE: When removing the video card from the base cover 12, first gently raise the side of the video card facing the interior of the base cover, then pull out the video card.

Check the model. There are two models of 760ED: one has a s-video card built in, and the other has an enhanced video card built in. If you install the incorrect video card, the LCD will not work. Check to be sure which 760ED model you are servicing.

S-Video Card

(760C/760L/760E/760ED/760EL/760LD/760ELD)

Enhanced Video Card

(760CD/760ED)

NOTE: Remove the 4 mm screws at both ends of the MIDI/joystick port connector (17).

When replacing the video card, align the power switch and power actuator 2. Check that the power switch operates correctly before tightening any screws.

• Diskette Drive/CD-ROM Drive (Model Unique)
• Battery Pack (760C/760L/760E/760EL)
• Hard Disk Drive
• Top Cover
• Keyboard Unit
• LCD Assembly
• Front IR and Rear IR
• Video Card
• DC/DC Card
• DSP Card/ Audio (ESS) Card
• CPU Card

NOTE: The system unit serial number must be restored when the system board is replaced. To restore the system unit serial number, select the option Set system identification on the maintenance diskette. The EEPROM on the system board contains the vital product data (VPD): the system unit serial number, system board system number, and other computer-unique data.

Do not power off the computer when restoring the VPD.

The system unit serial number label is attached to the base cover.

Before removing and replacing the system board, make sure that the PCMCIA cards are removed and the eject levers are not sticking out.

Do not pull the PCMCIA slot assembly while removing the system board.

When handling the PCMCIA slot assembly, be careful not to disassemble any part of it. The slot assembly is not solidly fixed when it is removed from the system board or the FRU.

Be sure to unlock both ends of the PCMCIA connector before removing the PCMCIA slot assembly from the system board (2).

1 Rear Door

2 Connector Door

3 MIDI/Joystick Port (model-unique)

4 External Diskette Drive Connector (model-unique)

5 Rear Infrared Port

6 System Expansion Connector

7 Power Shutdown Switch

8 External Display Connector

9 Parallel Connector

10 Serial Connector

11 Power Jack

12 Option Cover

13 Headphone Jack

14 Microphone/Line-in Jack

15 Modem/Fax Port

16 Video In/Out Ports (model-unique)

17 Power Switch

1 LCD

2 Built-in Microphone

3 Brightness Control

4 Keyboard Risers

5 Auto Tilt Keyboard

6 External-Input-Device Connector

7 PCMCIA Slot

8 PCMCIA Slot

9 Security Keyhole

10 Release Latches

11 Front Infrared Port

12 Built-in Speaker

13 Front Palm Rest

14 TrackPoint III

15 Removable Diskette Drive or CD-ROM Drive (model-unique)

16 CD-ROM Eject Button (CD-ROM model)

17 Fn Key

18 LCD Indicator Panel

19 Volume Control

(760L-760LD = 9547 ! see PLET ZG96-0100 / COP RSP 9547-01)

(760L-760LD = 9547 ! see PLET ZG96-0100 / COP RSP 9547-01)

1101A LCD Cover

NOTE: Be careful not to scratch the LCD cover when removing the screw covers 1

The LCD cover has several latches. Release these latches; then remove the LCD cover. Be careful not to break the latches.

NOTE: Make sure you use the correct screw when replacing.

1101B LCD Panel, Interface Cable Assembly

• LCD Cover (1101A)

NOTE: Be careful not to scratch or soil the surface of the LCD panel when replacing it.

The LCD panel is latched to the rear cover. Remove the LCD panel by bending the rear cover in step 6

Too much force will break the rear cover.

1101C Hinges

• LCD Cover (1101A)
• LCD Panel (1101B) (with interface cable assembly)

NOTE: Make sure you use the correct screw when replacing.

1102A LCD Cover

NOTE:

1. Be careful not to scratch the LCD cover when removing the screw covers 1
2. The LCD cover has several latches. Release these latches; then remove the LCD cover. Be careful not to break the latches.

NOTE: Make sure you use the correct screw when replacing.

Lift the LCD front cover, then remove the microphone cable.

NOTE: When replacing Position the microphone cable as shown.

1102B LCD Panel

• LCD Cover (1102A)

NOTE: Be careful not to scratch or soil the surface of the LCD panel when replacing it.

Lift the LCD panel and disconnect the connector for the interface cable. If there is the kapton tape on the rear of the panel, remove it.

NOTE: Make sure you use the correct screw when replacing.

1. The inverter card is very sensitive. Connect the interface cable as shown. Flexing the inverter card with too much force seriously damages the card.

• It is not safe to touch the inverter card connecter A.

  A loose or incorrect connection of the connector can cause a serious problem.

1102C Interface Cable Assembly, Hinges

• LCD Cover (1102A)
• LCD Panel (1102B)

1 When replacing the interface cable assembly

2, 3 When replacing the hinges

NOTE: Make sure you use the correct screw when replacing.

When replacing, Replace the kapton tape as shown below.

1103A LCD Cover

NOTE: Be careful not to scratch the LCD cover when removing the screw covers 1

The LCD cover has several latches. Release these latches; then remove the LCD cover. Be careful not to break the latches.

NOTE: Make sure you use the correct screw when replacing.

Lift the LCD front cover, then remove the microphone cable.

When replacing Position the microphone cable as shown.below.

1103B LCD Panel, Interface Cable Assembly

• LCD Cover (1103A)

NOTE: Be careful not to scratch or soil the surface of the LCD panel when replacing it.

NOTE: Make sure you use the correct screw when replacing.

When removing the interface cable assembly, remove the kapton tape on the cable, then disconnect the three connecters as shown.

When replacing Be careful not to place the core under the LCD panel.

1. The inverter card is very sensitive. Connect the interface cable as shown. Flexing the inverter card with too much force seriously damages the card.

• It is not safe to touch the inverter card connecter A.

  A loose or incorrect connection of the connector can cause a serious problem.

1103C Hinges

• LCD Cover (1103A)
• LCD Panel (1103B) (with interface cable assembly)

NOTE: Make sure you use the correct screw when replacing.

1104A LCD Cover

NOTE:

1. Be careful not to scratch the LCD cover when removing the screw covers 1
2. The LCD cover has several latches. Release these latches; then remove the LCD cover. Be careful not to break the latches.

NOTE: Make sure you use the correct screw when replacing.

Lift the LCD front cover, then remove the microphone cable.

NOTE: When replacing Position the microphone cable as shown.

1104B LCD Panel

• LCD Cover (1104A)

NOTE: Be careful not to scratch or soil the surface of the LCD panel when replacing it.

NOTE: Make sure you use the correct screw when replacing.

Lift the LCD panel a bit 2, then disconnect the flexible cable 3 and 4.

1. The inverter card is very sensitive. Connect the interface cable as shown. Flexing the inverter card with too much force seriously damages the card.

• It is not safe to touch the inverter card connecter A.

  A loose or incorrect connection of the connector can cause a serious problem.

1104C Interface Cable Assembly, Hinges

• LCD Cover (1104A)
• LCD Panel (1104B)

1, 2 When replacing the interface cable assembly

3, 4 When replacing the hinges

NOTE: Make sure you use the correct screw when replacing.

When replacing Don't locate the core under the LCD panel.

1105A LCD Cover

NOTE:

1. Be careful not to scratch the LCD cover when removing the screw covers 1
2. The LCD cover has several latches. Release these latches; then remove the LCD cover. Be careful not to break the latches.

NOTE: Make sure you use the correct screw when replacing.

Lift the LCD front cover, then remove the microphone cable.

NOTE: When replacing Position the microphone cable as shown.

1105B LCD Panel

• LCD Cover (1105A)

NOTE: Be careful not to scratch or soil the surface of the LCD panel when replacing it.

NOTE: Make sure you use the correct screw when replacing.

Lift the LCD panel a bit 3, then disconnect the flexible cable 4.

It is not safe to touch the inverter card connecter A. A loose or incorrect connection of the inverter card connector A can cause a serious problem. When replacing the inverter card, make sure the connector is connected correctly.

1105C Interface Cable Assembly, Hinges

• LCD Cover (1105A)
• LCD Panel (1105B)

1 When replacing the interface cable assembly

2 When replacing the hinges

1106A LCD Cover

NOTE: Be careful not to scratch the LCD cover when removing the screw covers 1

The LCD cover has several latches. Release these latches; then remove the LCD cover. Be careful not to break the latches.

NOTE: Make sure you use the correct screw when replacing.

Lift the LCD front cover, then remove the microphone cable.

NOTE: When replacing Position the microphone cable as shown.

1106B LCD Panel

• LCD Cover (1106A)

NOTE: Be careful not to scratch or soil the surface of the LCD panel when replacing it.

NOTE: Make sure you use the correct screw when replacing.

Lift the LCD panel a bit, then disconnect the interface cable connector.

1. The inverter card is very sensitive. Connect the interface cable as shown. Flexing the inverter card with too much force seriously damages the card.
2. It is not safe to touch the inverter card connecter A . A loose or incorrect connection of the connector can cause a serious problem.

1106C Interface Cable Assembly, Hinges

• LCD Cover (1106A)
• LCD Panel (1106B)

1 When replacing the interface cable assembly

2, 3 When replacing the hinges

Remove the kapton tape in step 1.

NOTE: Make sure you use the correct screw when replacing.

When replacing When replacing Replace the kapton tape as shown below.

1107A LCD Cover

NOTE: Be careful not to scratch the LCD cover when removing the screw covers 1

The LCD cover has several latches. Release these latches; then remove the LCD cover. Be careful not to break the latches.

NOTE: Make sure you use the correct screw when replacing.

Lift the LCD front cover, then remove the microphone cable.

NOTE: When replacing Position the microphone cable as shown.

1107B LCD Panel

• LCD Cover (1107A)

NOTE: Be careful not to scratch or soil the surface of the LCD panel when replacing it.

Lift the LCD panel and disconnect the connector for the interface cable. If there is the kapton tape on the rear of the panel, remove it.

NOTE: Make sure you use the correct screw when replacing.

1107C Interface Cable Assembly, Hinges

• LCD Cover 1107A)
• LCD Panel 1107B)

1 When replacing the interface cable assembly

2, 3 When replacing the hinges

Remove the kapton tape in step 1

1. The inverter card is very sensitive. Connect the interface cable as shown. Flexing the inverter card with too much force seriously damages the card.
2. It is not safe to touch the inverter card connecter A . A loose or incorrect connection of the connector can cause a serious problem.

• Diskette Drive/CD-ROM Drive (Model Unique)
• Battery Pack (760C/760L/760E/760EL)
• Hard Disk Drive

• Diskette Drive/CD-ROM Drive (Model Unique)
• Battery Pack (760C/760L/760E/760EL)
• Hard Disk Drive
• Top Cover
• LCD Assembly

How to Disable the Power-On Password:

1. Power-off the computer.
2. Open the keyboard, and remove the diskette drive or CD-ROM drive and the battery pack.
3. Install a jumper on the power-on password connector on the left side of the FDD connector. (See 'Password Connector' for location.)
4. Reinstall the battery pack and the diskette drive/CD-ROM drive.
5. Power-on the computer and wait until the POST ends.
6. Verify that the password prompt does not appear.
7. After the service check is completed, remove the jumper.

To reactivate the password, set the password again.

1 Power-On Password Connector

Supervisor and Hard Disk Passwords

The supervisor password and the hard disk password (HDP) are security features that are used to protect the system and the hard disk data from unauthorized access.

No overriding capability is provided. If only a hard disk password is set, obtaining permission from the password owner to unlock the password is a prerequisite for running diagnostic tests and performing service. If both supervisor password and hard disk password are set, you can enter Easy-Setup by pressing the Enter key or power-on password at the supervisor password prompt. In this case, the Password, Start up, and Initialize icons cannot be selected.

See 'Password Combinations (POP, HDP, PAP)' for more information about passwords.

When the power-on password (POP), hard disk password (HDP), and supervisor password (PAP) are used, the following situations may occur:

• When POP is the same as HDP-1 or HDP-2

The POP prompt appears, but one of the HDP prompts does not appear.

• When POP is not the same as HDP-1 and HDP-2

  The POP, HDP-1, and HDP-2 prompts all appear.

  • When PAP is used with HDP-1 or HDP-2

  When PAP is used, HDP-1 or HDP-2 are enabled automatically, but no HDP prompt appears. HDP-1 and HDP-2 are set the same as PAP.

Parts Listing 760 (9546, 9547)

Type 9546

• Model 760C
• Model 760CD
• CD-ROM Nonupgradable Type
• CD-ROM Upgradable Type or 760ED
• Model 760XD

Type 9547 (760L-760LD = 9547 ! see PLET ZG96-0100 -or- COP RSP 9547-01)

LCD Unit's

• LCD Unit 12.1 SVGA (P/N 29H9226, ASM P/N 29H9029) 760EL/760ELD
• LCD Unit 12.1 SVGA (P/N 29H9226, ASM P/N 73H6599) 760C/760CD, 760E/760ED
• LCD Unit 10.4 SVGA (P/N 29H9227) 760C-U.S. only
• LCD Unit 10.4 VGA (P/N 46H5355) 760L/760LD
• LCD Unit 11.3 DSTN (P/N 39H6232) 760EL
• LCD Unit 11.3 XVGA (P/N 82H8486) 760E/760ED
• LCD Unit 12.1 SVGA (P/N 82H8496) 760E/760ED, 760EL
• LCD Unit 12.1 SVGA (P/N 46H5725) 760XL
• LCD Unit 12.1 XGA (P/N 46H5735, ASM P/N 46H5731) 760XD

ThinkPad Option's

ThinkPad/WorkPad - SCREW KIT FRUs

A new range ofFRU Screw Kits have been released for various Thinkpad/WorkPad Models.These new Screw Kits contain *Nylock screws where the thread of the screws have been coated with Nylon to ensure that the appropriate screw torque is maintained for the life of the product.

• They maintain tight connections.
• They do not easily come loose, even with shock or vibration.
• They need additional force to tighten.
• The should be used only once .

Do the following when you service one of the below listed machines:

• Keep the screw kit in your tool bag.
• Always use new screws .
• Use a torque screwdriver if available. (see below 'Screw Tightening Information')

The following screw FRU part numbers have been made available for servicers.

Bulk, kit, and individual screw FRUs are listed.

Use the appropriate FRU P/N that correspond to your usage of screw FRUs.

Screw Tightening Information

Loose screws can cause reliability problems. The IBM ThinkPad/WorkPad computer addresses this problem with nylon-coated screws.

Tighten screws as follows:

Plastic to Plastic

Turn an additional 90 degrees after the screw head touches the surface of the plastic part.

Logic Card to Plastic

Turn an additional 180 degrees after the screw head touches the surface of the plastic part.

Torque screw-drivers can be ordered from:

Techni-Tool
5 Apollo Road
Box 368
Plymouth Meeting
PA 19462
USA
Phone : Sales 1-610-941-2400
Fax : 1-610-828-5623
http://www.techni-tool.com

Miscellaneous Parts

Power Cords

Use the power cord certified for your country.

3-Prong

|

1 Colombia, U.S., Venezuela | 25H2207 |

| --- | --- | | Korea | 25H2207 | | Japan, 2-prong | 85G6665 | | 2 Hong Kong, Singapore, U.K. | 25H2215 | | 3 France, Germany, Spain | 25H2209 | | 4 Italy | 25H2223 | | 5 Australia, New Zealand | 25H2205 | | 6 Denmark | 25H2211 | | 7 Israel | 25H2225 | | | | | 8 Bangladesh, Pakistan, | 25H2213 | | Sri Lanka, South Africa | | | | | | 9 Switzerland | 25H2221 | | 10 Thailand | 25H2219 | | 2-Prong Slim | | | | | | 1 Colombia, U.S., Venezuela | 13H5264 | | Korea | 13H5264 | | Japan | 13H5273 | | 2 Hong Kong, Singapore, U.K. | 13H5267 | | 3 France, Germany, Spain | 13H5270 | | 4 Italy | 13H5270 | | 5 Australia, New Zealand | 13H5276 | | 6 Denmark | 13H5270 | | 7 Israel | 13H5270 | | | | | 8 Bangladesh, Pakistan, | 13H5279 | | Sri Lanka, South Africa | | | | | | 9 Switzerland | 13H5270 | | 10 Thailand | 13H5264 | | 3-Prong Slim | | | | | | 1 Colombia, U.S., Venezuela | 76H3516 | | Korea | 76H3535 | | Japan | 76H3526 | | 2 Hong Kong, Singapore, U.K. | 76H3524 | | 3 France, Germany, Spain | 76H3518 | | 4 Italy | 76H3530 | | 5 Australia, New Zealand | 76H3514 | | 6 Denmark | 76H3520 | | 7 Israel | 76H3532 | | | | | 8 Bangladesh, Pakistan, | 76H3522 | | Sri Lanka, South Africa | | | | | | 9 Switzerland | 76H3528 | | 10 Thailand | 76H3516 |

Common Parts Listing

This section contains FRUs common to most IBM portable, laptop, and notebook computers.

External Diskette Drives

CD-ROM Drives

SCSI Adapters, Terminators, Cables

Rewritable Optical Drives

External Keyboard/Mouse

Enhanced Keyboards (101/102 Key)

Optional Enhanced Keyboards (101/102 Key)

Keybutton Kits (101/102 Key)

Japanese Keyboard Type 2 (106 Key, DBCS Support)

Space-Saving Keyboards (84/85 Key)

Tools and Miscellaneous

The TV Tuner Pack (hereafter called TV Tuner) is an option for watching TV programs or videos on the IBM TFT color notebook computer. The computer changes to TV reception when the removable diskette drive is replaced with the TV Tuner.

The TV screen and normal computer display are easily switched by using the Hot key on the front panel of the TV Tuner.

Identifying Names and Functions

The following figure and table show the names and functions of each part of the TV Tuner.

Connects the active antenna unit or antenna cable.

Using the Front Panel

The following table shows how to operate all functions of the TV Tuner with the controls on the front panel.

Key Function
Power

Turns on the TV Tuner.
This key is used only when the computer is turned on.
Hot Key

Switches computer display and TV screen.
Up

Increases the value of parameters, Channel Number,
Color, Tint, Brightness, Contrast, Auto Tuning Sensitivity,
On-screen Message Selection.
Down

Decreases the value of parameters, Channel Number
Color, Tint, Brightness, Contrast, Auto Tuning Sensitivity,
On-screen Message Selection.
Function

Selects a function mode to adjust each function parameter.
(See Using the Function Key)
TV/Ext

Switches the displayed video source between
the receiving TV broadcast program and external devices such as
VCR, video camera recorder, laser disk, and so on.

If the security latch A is at the left position, push and slide it to the right position (unlock).

Remove the CD-ROM drive exactly as shown in the figure.

Do not apply any extra force to the CD-ROM drive when removing it.

If the security latch A is at the left position, push and slide it to the right position (unlock).

In this EPRM, safety notices are referenced to the appropriate multi-lingual, translated safety notice in this section.

The following safety notices are provided in English, French, German, Italian, and Spanish languages.

Safety Notice 1

Before the computer is powered-on after FRU replacement, make sure all screws, springs, or other small parts are in place and are not left loose inside the computer. Verify this by shaking the computer and listening for rattling sounds. Metallic parts or metal flakes can cause electrical shorts.

Avant de remettre l'ordinateur sous tension après remplacement d'une unité en clientèle, vérifiez que tous les ressorts, vis et autres pièces sont bien en place et bien fixées. Pour ce faire, secouez l'unité et assurez-vous qu'aucun bruit suspect ne se produit. Des pièces métalliques ou des copeaux de métal pourraient causer un court-circuit.

Bevor nach einem FRU-Austausch der Computer wieder angeschlossen wird, muß sichergestellt werden, daß keine Schrauben, Federn oder andere Kleinteile fehlen oder im Gehäuse vergessen wurden. Der Computer muß geschüttelt und auf Klappergeräusche geprüft werden. Metallteile oder -splitter können Kurzschlüsse erzeugen.

Prima di accendere l'elaboratore dopo che é stata effettuata la sostituzione di una FRU, accertarsi che tutte le viti, le molle e tutte le altri parti di piccole dimensioni siano nella corretta posizione e non siano sparse all'interno dell'elaboratore. Verificare ci• scuotendo l'elaboratore e prestando attenzione ad eventuali rumori, eventuali parti o pezzetti metallici possono provocare cortocircuiti pericolosi.

Antes de encender el sistema despues de sustituir una FRU, compruebe que todos los tornillos, muelles y demás piezas pequeñas se encuentran en su sitio y no se encuentran sueltas dentro del sistema. Compruébelo agitando el sistema y escuchando los posibles ruidos que provocarían. Las piezas metálicas pueden causar cortocircuitos eléctricos.

Safety Notice 2

Some standby batteries contain a small amount of nickel and cadmium. Do not disassemble it, recharge it, throw it into fire or water, or short-circuit it. Dispose of the battery as required by local ordinances or regulations. Use only the battery in the appropriate parts listing. Use of an incorrect battery can result in ignition or explosion of the battery.

Certaines batteries de secours contiennent du nickel et du cadmium. Ne les démontez pas, ne les rechargez pas, ne les exposez ni au feu ni à l'eau. Ne les mettez pas en court-circuit. Pour les mettre au rebut, conformez-vous à la réglementation en vigueur. Lorsque vous remplacez la pile de sauvegarde ou celle de l'horloge temps réel, veillez à n'utiliser que les modèles cités dans la liste de pièces détachées adéquate. Une batterie ou une pile inappropriée risque de prendre feu ou d'exploser.

Die Bereitschaftsbatterie, die sich unter dem Diskettenlaufwerk befindet, kann geringe Mengen Nickel und Cadmium enthalten. Sie darf nur durch die Verkaufsstelle oder den IBM Kundendienst ausgetauscht werden. Sie darf nicht zerlegt, wiederaufgeladen, kurzgeschlossen, oder Feuer oder Wasser ausgesetzt werden. Die Batterie kann schwere Verbrennungen oder Verätzungen verursachen. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim Ersetzen der Bereitschafts- oder Systembatterie nur Batterien des Typs verwenden, der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher Batterien kann zu Entzündung oder Explosion führen.

Alcune batterie di riserva contengono una piccola quantità di nichel e cadmio. Non smontarle, ricaricarle, gettarle nel fuoco o nell'acqua né cortocircuitarle. Smaltirle secondo la normativa in vigore (DPR 915/82, successive disposizioni e disposizioni locali). Quando si sostituisce la batteria dell'RTC (real time clock) o la batteria di supporto, utilizzare soltanto i tipi inseriti nell'appropriato Catalogo parti. L'impiego di una batteria non adatta potrebbe determinare l'incendio o l'esplosione della batteria stessa.

Algunas baterías de reserva contienen una pequeña cantidad de níquel y cadmio. No las desmonte, ni recargue, ni las eche al fuego o al agua ni las cortocircuite. Deséchelas tal como dispone la normativa local. Utilice sólo baterías que se encuentren en la lista de piezas. La utilización de una batería no apropiada puede provocar la ignición o explosión de la misma.

Safety Notice 3

The battery pack contains small amounts of nickel. Do not disassemble it, throw it into fire or water, or short-circuit it. Dispose of the battery pack as required by local ordinances or regulations. Use only the battery in the appropriate parts listing when replacing the battery pack. Use of an incorrect battery can result in ignition or explosion of the battery.

La batterie contient du nickel. Ne la démontez pas, ne l'exposez ni au feu ni à l'eau. Ne la mettez pas en court-circuit. Pour la mettre au rebut, conformez-vous à la réglementation en vigueur. Lorsque vous remplacez la batterie, veillez à n'utiliser que les modèles cités dans la liste de pièces détachées adéquate. En effet, une batterie inappropriée risque de prendre feu ou d'exploser.

Akkus enthalten geringe Mengen von Nickel. Sie dürfen nicht zerlegt, wiederaufgeladen, kurzgeschlossen, oder Feuer oder Wasser ausgesetzt werden. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim Ersetzen der Batterie nur Batterien des Typs verwenden, der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher Batterien kann zu Entzündung oder Explosion führen.

La batteria contiene piccole quantità di nichel. Non smontarla, gettarla nel fuoco o nell'acqua né cortocircuitarla. Smaltirla secondo la normativa in vigore (DPR 915/82, successive disposizioni e disposizioni locali). Quando si sostituisce la batteria, utilizzare soltanto i tipi inseriti nell'appropriato Catalogo parti. L'impiego di una batteria non adatta potrebbe determinare l'incendio o l'esplosione della batteria stessa.

Las baterías contienen pequeñas cantidades de níquel. No las desmonte, ni recargue, ni las eche al fuego o al agua ni las cortocircuite. Deséchelas tal como dispone la normativa local. Utilice sólo baterías que se encuentren en la lista de piezas al sustituir la batería. La utilización de una batería no apropiada puede provocar la ignición o explosión de la misma.

Safety Notice 4

The lithium battery can cause a fire, explosion, or severe burn. Do not recharge it, remove its polarized connector, disassemble it, heat it above 100°C (212°F), incinerate it, or expose its cell contents to water. Dispose of the battery as required by local ordinances or regulations. Use only the battery in the appropriate parts listing. Use of an incorrect battery can result in ignition or explosion of the battery.

La pile de sauvegarde contient du lithium. Elle présente des risques d'incendie, d'explosion ou de brûlures graves. Ne la rechargez pas, ne retirez pas son connecteur polarisé et ne la démontez pas. Ne l'exposez pas à une temperature supérieure à 100°C, ne la faites pas brûler et n'en exposez pas le contenu à l'eau. Mettez la pile au rebut conformément à la réglementation en vigueur. Une pile inappropriée risque de prendre feu ou d'exploser.

Die Systembatterie ist eine Lithiumbatterie. Sie kann sich entzünden, explodieren oder schwere Verbrennungen hervorrufen. Batterien dieses Typs dürfen nicht aufgeladen, zerlegt, über 100 C erhitzt oder verbrannt werden. Auch darf ihr Inhalt nicht mit Wasser in Verbindung gebracht oder der zur richtigen Polung angebrachte Verbindungsstecker entfernt werden. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim Ersetzen der Batterie nur Batterien des Typs verwenden, der in der Ersatzteilliste aufgeführt ist. Der Einsatz falscher Batterien kann zu Entzündung oder Explosion führen.

La batteria di supporto e una batteria al litio e puo incendiarsi, esplodere o procurare gravi ustioni. Evitare di ricaricarla, smontarne il connettore polarizzato, smontarla, riscaldarla ad una temperatura superiore ai 100 gradi centigradi, incendiarla o gettarla in acqua. Smaltirla secondo la normativa in vigore (DPR 915/82, successive disposizioni e disposizioni locali). L'impiego di una batteria non adatta potrebbe determinare l'incendio o l'esplosione della batteria stessa.

La bateria de repuesto es una bateria de litio y puede provocar incendios, explosiones o quemaduras graves. No la recargue, ni quite el conector polarizado, ni la desmonte, ni caliente por encima de los 100°C (212°F), ni la incinere ni exponga el contenido de sus celdas al agua. Deséchela tal como dispone la normativa local.

Safety Notice 5

If the LCD breaks and the fluid from inside the LCD gets into your eyes or on your hands, immediately wash the affected areas with water for at least 15 minutes. Seek medical care if any symptoms from the fluid are present after washing.

Si le panneau d'affichage à cristaux liquides se brise et que vous recevez dans les yeux ou sur les mains une partie du fluide, rincez-les abondamment pendant au moins quinze minutes. Consultez un médecin si des symptômes persistent après le lavage.

Die Leuchtstoffröhre im LCD-Bildschirm enthält Quecksilber. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Der LCD-Bildschirm besteht aus Glas und kann zerbrechen, wenn er unsachgemäß behandelt wird oder der Computer auf den Boden fällt. Wenn der Bildschirm beschädigt ist und die darin befindliche Flüssigkeit in Kontakt mit Haut und Augen gerät, sollten die betroffenen Stellen mindestens 15 Minuten mit Wasser abgespült und bei Beschwerden anschließend ein Arzt aufgesucht werden.

Nel caso che caso l'LCD si dovesse rompere ed il liquido in esso contenuto entrasse in contatto con gli occhi o le mani, lavare immediatamente le parti interessate con acqua corrente per almeno 15 minuti, poi consultare un medico se i sintomi dovessero permanere.

Si la LCD se rompe y el fluido de su interior entra en contacto con sus ojos o sus manos, lave inmediatamente las áreas afectadas con agua durante 15 minutos como mínimo. Obtenga atención medica si se presenta algún síntoma del fluido despues de lavarse.

Safety Notice 6

To avoid shock, do not remove the plastic cover that surrounds the lower portion of the inverter card.

Afin d'éviter tout risque de choc électrique, ne retirez pas le cache en plastique protégeant la partie inférieure de la carte d'alimentation.

Aus Sicherheitsgründen die Kunststoffabdeckung, die den unteren Teil der Spannungswandlerplatine umgibt, nicht entfernen.

Per evitare scosse elettriche, non rimuovere la copertura in plastica che avvolge la parte inferiore della scheda invertitore.

Para evitar descargas, no quite la cubierta de plástico que rodea la parte baja de la tarjeta invertida.

Safety Notice 7

Though main batteries have low voltage, a shorted or grounded battery can produce enough current to burn combustible materials or personnel.

Bien que le voltage des batteries principales soit peu élevé, le court-circuit ou la mise à la masse d'une batterie peut produire suffisamment de courant pour brûler des matériaux combustibles ou causer des brûlures corporelles graves.

Obwohl Hauptbatterien eine niedrige Spannung haben, können sie doch bei Kurzschluß oder Erdung genug Strom abgeben, um brennbare Materialien zu entzünden oder Verletzungen bei Personen hervorzurufen.

Sebbene le batterie di alimentazione siano a basso voltaggio, una batteria in corto circuito o a massa può fornire corrente sufficiente da bruciare materiali combustibili o provocare ustioni ai tecnici di manutenzione.

Aunque las baterías principales tienen un voltaje bajo, una batería cortocircuitada o con contacto a tierra puede producir la corriente suficiente como para quemar material combustible o provocar quemaduras en el personal.

Safety Notice 8

Before removing any FRU, power-off the computer, unplug all power cords from electrical outlets, remove the battery pack, then disconnect any interconnecting cables.

Avant de retirer une unité remplaçable en clientèle, mettez le système hors tension, débranchez tous les cordons d'alimentation des socles de prise de courant, retirez la batterie et déconnectez tous les cordons d'interface.

Die Stromzufuhr muß abgeschaltet, alle Stromkabel aus der Steckdose gezogen, der Akku entfernt und alle Verbindungskabel abgenommen sein, bevor eine FRU entfernt wird.

Prima di rimuovere qualsiasi FRU, spegnere il sistema, scollegare dalle prese elettriche tutti i cavi di alimentazione, rimuovere la batteria e poi scollegare i cavi di interconnessione.

Antes de quitar una FRU, apague el sistema, desenchufe todos los cables de las tomas de corriente eléctrica, quite la batería y, a continuación, desconecte cualquier cable de conexión entre dispositivos.