ThinkPad 770 Series

2 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 — 35 models of machine type 9548

Variant	Model codes
ThinkPad 770	9548-300, 9548-30F, 9548-30J, 9548-30K, 9548-30P, 9548-30S, 9548-30U, 9548-310, 9548-31F, 9548-31J, 9548-31U, 9548-32U, 9548-400, 9548-40F, 9548-40J, 9548-40P, 9548-40S, 9548-40U
ThinkPad 770E	9548-510, 9548-51A, 9548-51E, 9548-51F, 9548-51J, 9548-51P, 9548-51S, 9548-51U, 9548-520, 9548-52A, 9548-52F, 9548-52J, 9548-52P, 9548-52S, 9548-52U, 9548-530, 9548-53U

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.

Start here. Work out the symptom first, then use the table to find the procedure that applies.

1. Obtain the failing symptoms in as much detail as possible.
2. Verify the symptoms by attempting to re-create the failure, either by running the diagnostic test or by repeating the same operation.
3. Use the table below with the verified symptom to decide where to go next.

DIMM cards are available for increasing memory capacity. The memory size is displayed in kilobytes; 576 KB is reserved by the system, so the displayed size is [total memory size (MB)] × 1024 − 576 (KB). A machine with 64 MB fitted therefore reports 64960 KB.

Memory errors might stop system operations, show error messages on the screen, or hang the system. Use the following procedure to isolate memory problems.

1. Power off the computer and remove any installed DIMM from its slot.

   Note: If the computer has a base memory slot and option memory slots, remove any DIMMs installed in the option memory slots.

2. Press and hold the F1 key, then power on the computer. Hold F1 down until the Easy-Setup menu 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:
   • If the computer does not have a base memory slot, replace the system board.
   • If the computer has a base memory slot, remove the DIMM installed in it and go to step 2. If an error still appears, replace the system board.
   If no error appears, continue below.
5. Power off the computer and reinstall the DIMMs one by one, powering on each time. Verify the memory size, then test the memory. If an error appears, replace that DIMM.

   Note: Make sure the DIMM is fully installed into the connector. A loose connection can cause an error.

6. If the problem is not corrected, replace the following FRUs in order:
   1. System board
   2. CPU 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.

ThinkPad Common Parts List

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.

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.

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 less than +3.0 Vdc, replace the standby battery.

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

1. Press and hold F1, then power on the computer. Hold F1 down until the Easy-Setup menu appears.
2. Click on Test. The basic diagnostic menu appears.
3. Click on a device to run the test. The test progress screen appears, then OK appears under the tested device icon when the test ends without any errors.
4. Start the Advanced Diagnostic test by pressing Ctrl+A on the basic diagnostic menu. The ThinkPad FRU connections window appears.
5. Click on Exit or press Esc. The keyboard test window appears.
6. When you press a key, a mark appears or disappears on the corresponding key position on the screen. Repeat for any keys that need testing. You can run the keyboard test by pressing Ctrl+K in advanced diagnostic test mode.
7. To exit the keyboard test, click on Exit or press Ctrl+Break. The advanced diagnostics window appears.
8. Click on a device to test it, or click on Test All to test all devices.

Special tools needed for the diagnostics:

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

This index lists symptoms and errors with their possible causes. The most likely cause is listed first.

Numeric error codes show the errors detected in POST or system operation — see Numeric Error Codes. In those codes, X can be any number. If no codes are available, use the 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.

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

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.

Codes shown during POST or system operation. X stands for any digit. Work through the FRU/Action column in the order given.

How to read the removal procedures on this page. Only certified and trained personnel should service the computer, and care should be taken not to damage any part.

• Arrows in each procedure show the direction of movement to remove a FRU, or the direction to turn a screw to release it. They are numbered in square callouts to show the correct sequence.
• If other FRUs must be removed first, they are listed at the top of the procedure.
• To replace a FRU, reverse the removal procedure and follow any notes that apply to replacement.
• When replacing a FRU, use the correct screw as shown in the procedure.

The numbered procedures below (1030, 1040, 1060 and so on) follow IBM's own removal order — a higher number generally requires the lower-numbered parts to be removed first.

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

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

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.

• 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.

• 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.

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.

Using the Front Panel

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

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).