IBM CL57 SX

The IBM PS/2 CL57 SX is renowned for being IBM's first portable computer featuring a color TFT display.

1. Power-on the computer.
2. When the cursor moves to the upper right, press Ctrl+Alt+Ins to start the system program. If the IBM  logo does not appear, insert the backup copy of the Reference Diskette into  the diskette drive, press Ctrl+Alt+Del , then repeat this  step.
3. Advance to the Main Menu.
4. Press Ctrl+A to run the system checkout.

The IBM PS/2 CL57 SX is renowned for being IBM's first portable computer featuring a color TFT display.

The Symptom-to-FRU Index lists error symptoms and possible causes. The most likely cause is listed first. Always begin with 'General Checkout' This index also can be used to help you decide which FRUs to have available when servicing a computer.

If you are unable to correct the problem using this index, go to 'Undetermined Problem'

  If you have both an error message and an incorrect audio response, diagnose the error message first.

If you cannot run the advanced diagnostics tests, but did receive a POST error message, diagnose the POST error message.

If you did not receive an error message, look for a description of your error symptoms in the first part of this index.

Check all power supply voltages before you replace the system board. (See 'Power Systems Checkout')

If an error message is not listed, there is a device installed that requires an additional diskette or service manual. Refer to the diskette or service manual for that device.

How to Read POST Error Messages

POST error messages are displayed on the screen as 3, 4, 5, or 8 digits. The error messages that can be displayed as shorter POST messages are highlighted in the 'Symptom-to-FRU Index'

In the 'Symptom-to-FRU Index', an X in an error message can be any number.

If missing or discolored dots appear on the LCD, carefully read the following note to determine whether you should replace the LCD.

  The LCD for the Model CL57 contains over 921000 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 dots satisfies either of the following conditions:

• The number of missing or discolored dots in any colored back ground,  except black, is 14 or more.
• The number of lighted dots in a black background is 7 or more.

  FRU Removals and Replacements

Follow the numerical sequence in the FRU removal sequence list and the exploded view to remove or disconnect parts in the correct order. The letters in parentheses in the list indicate screw types. See the 'Screw Size Chart' to match the letters to the correct screw type and size before replacing each screw.

  **Safety 8

Safety 1**

1. Battery Cover- Battery Pack- Hinge Covers- Six Screws (4-EE, 2-C)

      (One at each bottom corner and two through extensions at bottom of LCD)- **LCD Rear Cover**
        (To separate panel from rear cover, place screwdriver in small
   
        slit in bottom front of LCD panel and release latch.)- **Two Cables from LCD Assembly**- **Four Screws** ([LL](#screw-size-chart))
   
            (Two on each side)
   
            **LCD Assembly**- **Bend Back Thirteen LCD Panel Tabs**
   
            **Four LCD Panel Screws** ([MM](#screw-size-chart))
   
              (From back of panel)- **Separate LCD Panel and LCD Bezel**- **Three Bottom Cover Screws** ([LL](#screw-size-chart))
   
                  (At bottom-front)- **Keyboard Frame**- **Two Screws** ([MM](#screw-size-chart))
   
                      (At rear of keyboard)- **Loosen Keyboard**- **Four Screws** ([MM](#screw-size-chart))
   
                          (Look for **13** four times in illustration.)- **Loosen Top Cover**- **Two Ribbon Cables**
   
                              **Keyboard**
   
                              (Keyboard can be removed without removing top cover. However,
                              keyboard cables cannot be reconnected with top cover installed.)- **Trackball Cable**
   
                                (At right-rear of keyboard)- **Indicator Card Cable**
   
                                  **Top Cover**
   
                                  (See step **14** Ensure that keyboard is removed before removing top
                                 cover.)- **Two Trackball Assembly Screws** ([LL](#screw-size-chart))- **Trackball Assembly**- **Speaker Cable**- **Four Screws** ([LL](#screw-size-chart))
   
                                          (Two indicator card screws from rear and two speaker retainer bracket
   
                                          screws from bottom)- **Indicator Card**
   
                                            (When replacing indicator card, ensure that speaker volume switch and
   
                                            power-on switch fit into their respective slots in top cover.)- **Speaker**- **Two Diskette Drive Ribbon Cables**- **Four Diskette Drive Screws** ([LL](#screw-size-chart))- **Micro Switch Cable**- **Diskette Drive and Mounting Bracket**- **Two Hard Disk Drive Ribbon Cables**- **Four Hard Disk Drive Screws** ([LL](#screw-size-chart))- **Hard Disk Drive and Mounting Bracket**
   
                                                            (Have customer backup all information on hard disk drive before
   
                                                            removal. When replacing hard disk drive, use customer's
   
                                                            backup Reference Diskette to restore system partition.)- **Backup Battery**- **Keyboard Control Card Ribbon Cable**- **Three Keyboard Control Card Screws** ([NN](#screw-size-chart))- **Keyboard Control Card**- **Display Control Card Ribbon Cable**
   
                                                                      (Press and hold metal clips on each side of cable connector.)- **Two Display Control Card Screws** ([LL](#screw-size-chart))- **Display Control Card**- **Two Hinge Support Screws** ([LL](#screw-size-chart))
   
                                                                            (On hinge support)
   
                                                                          **Six Screws** ([4-PP, 2-QQ](#screw-size-chart)) **and Hinge Assemblies**
   
                                                                            (Three screws on each side)- **Loosen Hinge Support**
   
                                                                              **Two Regulator Card Cables**- **Three Regulator Card Screws** ([LL](#screw-size-chart))- **Regulator Card**- **Two I/O Connector Ribbon Cables**- **Two Threaded Spacers**- **Three Modem Guide Screws** ([V](#screw-size-chart))- **Two Threaded Hex Spacers**
   
                                                                                          (At each end of system board)- **Voltage Converter Cable**
                                                                                          **System Board Cable (upper left)**
   
                                                                                            **System Board and Mounting Bracket**
   
                                                                                            (When installing system board, ensure that power control switch on
   
                                                                                            I/O panel is set to On. Also, run Automatic Configuration and set
   
                                                                                            time and date. Transfer math coprocessor (if installed) to new
   
                                                                                            system board.)
   
                                                                                            **IC DRAM Card Connector**
   
                                                                                            (Connected under system board.)- **Two I/O Connector Screws** ([LL](#screw-size-chart))- **I/O Connectors and Cover**- **Six Voltage Converter Card Screws** ([SS](#screw-size-chart))- **Two Threaded Spacers**
   
                                                                                                    (On voltage converter card)
   
                                                                                                    **Battery Cable**- **Voltage Converter Card**
   
                                                                                                      (Be careful to use correct screws to replace voltage converter.
   
                                                                                                      Bottom cover can be cracked.)
   

Back to

Locations System Board

1. System Expansion Connector (150-pin)
2. Display Control Card
3. Serial Connector
4. I/O Panel (Parallel/External Input)
5. Indicator Card
6. Password-Override Connector
7. Backup Battery
8. Communication Interface (Modem/Serial)
9. Diskette Drive
10. Thermal Sensor
11. Hard Disk Drive
12. Trackball/Keyboard Card Connector
13. Dew Point Sensor
14. Voltage Converter
15. Voltage Converter

 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.

 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.

NOTE: One or all of the batteries can discharge if there is a short circuit in the computer.

1. Replace the failing FRU if the power supply problem is caused by  a short circuit.
2. Determine if one (or all) of the batteries have become discharged.  Replace a discharged battery with a known-good spare.
3. Observe the Battery ID indicators or swap the two battery packs  to determine which one has become discharged.

The test procedures for each power supply are found on the following pages.

Testing the AC Adapter

Testing the Battery Pack

Testing the Backup Battery

None of the above ? Follow the steps below.

If the status lights match either condition A or B, replace the voltage converter. If the status lights are different from condition A or B, or replacing the voltage converter does not correct the problem, go to 'Undetermined Problem'

  Power-on Password

To service a computer with an active, unknown, power-on password, do the following.

1. Power-off the computer and unplug the power cord.
2. Remove the keyboard and top cover.
3. Locate the override connector on the system board.  Some models use connector J12 (8 pins shown below). Other models  use connector J13 (a 2-pin connector).
4. Install a jumper over the pins of the connector as shown.
5. Power-on the computer to erase the password.
6. After POST completes, remove the jumper. Otherwise, you will  not be able to reset a power-on password.

To set the password, start the system programs, select Set features from the Main Menu, then select Set password and unattended start mode, and follow the instructions on the screen.

If the Power-On indicator is not on, check the power cord of the AC adapter for proper installation and continuity.

1. If any noise can be heard from the AC adapter when it is  plugged into line voltage, replace  the AC adapter with a new one.

If no noise can be heard from the adapter,  go to Step 2.- If the noise still comes from the new AC adapter, suspect  the computer. Replace the AC adapter with the original one, then  go to the next step. If no noise comes from the new adapter,  the original adapter has the problem.- Unplug the AC adapter cable from the computer and  measure the output voltages at the plug of the AC adapter cable.  Connect the minus lead of the volt-ohm meter to pin 3 during  the measurement.

• If the voltages are not correct:

1. Unplug the AC adapter from the ac power outlet and leave it for  a few minutes.
2. Plug the AC adapter into the ac outlet.
3. Measure the output voltages of the AC adapter.
4. If the voltages are still not correct, replace the AC adapter.

• If the voltages are OK, plug the cable into the computer  and try the failing operation again.

If the problem still remains, replace the voltage converter. If the problem disappeared, suspect the installation and continuity of the AC adapter cable.

1. Remove each battery pack and measure the voltage at the  battery terminals between (+) and (-).

• If the voltage is less than +12 V dc, the battery pack is  discharged or defective.
• If the voltage is more than +12 V dc,  go to the next step.

• Using a low-power ohm meter, measure the resistance at  the battery terminals between

  (T) and (-).  The resistance must be 500 ohms to 20 kilohms.

  If the resistance is out of range, replace the battery pack.

1. Remove the keyboard and the top cover.
2. Disconnect the battery connector from the system board.
3. Measure the voltage of the backup battery.

If the voltage is correct, replace the system board. If it is not, the backup battery is discharged by a short circuit or is defective.

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.

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.

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

Customer diagnostics can eliminate defective memory so no memory error code appears at power-on reset. After you replace a defective memory module on the system board or IC DRAM card, run Automatic Configuration. Otherwise, the new memory will not be recognized. (If you have to run configuration with your own diskette, be sure the customer has all the correct option diskettes available.) Power-off the computer before removing or replacing parts.

NOTE: A no beep symptom can be caused by incorrect volume setting of the speaker. Set the speaker volume to its maximum position.

You are here because the diagnostics tests did not identify the failing FRU.

Check the power supply in use (see 'Power Systems Checkout'). If the power supply is operating correctly, return here and continue with the following procedure.

1. Power-off the computer and remove the battery packs from the  computer.- Remove or disconnect one of the following devices or adapter  (do not isolate FRUs that are known to be good).

   1. Non-IBM devices
   2. Modem, printer, mouse, or other external device
   3. IC DRAM card
   4. Hard disk drive (fixed disk drive) or diskette drive
   5. Communications cartridge
   6. Any adapter and device
   • Power-on the computer and start the system program.
   • Press Ctrl+A to run the system  checkout. Do not configure the computer. If diagnostics cannot be loaded  from the hard disk, try and load them from the Reference  Diskette. Test only those adapters and devices still attached to the  computer.
   • If the symptom remains, repeat steps 1 through 3 until you find  the failing FRU or until all FRUs have been removed.
   • If all of the FRUs listed have been removed and the problem remains,  replace the system board.

The Installed Devices List shows the presence of devices in the computer. If an adapter or device is missing from the list, you might have one of the following conditions.

  A customized setup configuration (other than default settings) might exist on the computer you are servicing. Running Automatic Configuration can alter those settings. Note the current configuration settings (using the View configuration) and verify that the same settings are in place when service is complete.

• The protected partition on the hard disk or the Reference  Diskette you are using does not contain the code required to support  that device.
• An adapter or device is defective.
• The device missing from the list is an unrecognizable drive or  adapter.
• The device missing from the list requires an additional diskette.
• A power supply voltage is incorrect (see 'Power Systems Checkout' ).

If the adapter is on the list, run the adapter diagnostics tests. If the list contains an adapter or device that is not installed, go to 'Undetermined Problem'

This section provides related service information on the following:

A protected partition on the hard disk contains the system configuration data set, system setup programs, and customer and advanced diagnostics. System setup and diagnostic programs can be loaded from this partition by pressing and holding Ctrl+Alt+Del and, as soon as the cursor moves to the upper right corner of the display, pressing and holding Ctrl+Alt+Ins.

If a computer or hard disk problem prevents system setup or diagnostic programs from being loaded from the protected partition, load and run the programs from the Reference Diskette. If no errors are found, restore the programs to the protected partition on the hard disk using the following procedure.

1. Start the computer with the customer's backup  copy of the Reference Diskette installed.
2. Select the Backup/Restore system programs from the  Main Menu.
3. Select the Restore the system partition to  load the system setup and utility programs, and  the customer and advanced diagnostics  programs onto the system partition of the hard disk.

If this does not correct the problem, use the backup copy of the Reference Diskette to format the hard disk and then restore the programs to the protected partition. If the problem remains, return to the I998XXXX, I9990303 error code (in the 'Symptom-to-FRU Index')

NOTE: After the programs have been restored, the Diskette and F1 prompts appear, unless an operating system is present.

Use the chart to match the size and shape of the screws in the computer you are servicing.