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7.985 bytes |
Service Hints & Tips |
Document ID: GSMH-3BKLFX |
TP 755CE/CSE/CV/CX - Miscellaneous Checkout
Applicable to: World-Wide
System Board and Processor Card Checkout:
The processing functions are performed by both the system board and the processor card. Processor problems can be caused by either FRU. However, the processor card generally has a lower probability of failure. When a numeric code calls the system board or the processor card as a FRU, or the processor 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 processor card. If no error is detected, return to "General Checkout".
2. If FRU code 10 appears, replace the system board but do not replace the processor card. Transfer the processor card from the old system board to the new system board.
3. If FRU code 11 appears, reseat the processor card.
4. Rerun the test to verify the fix.
5. If FRU code 11 remains, replace the processor card.
If above procedure does not correct the problem, go to "Undetermined Problems".
Keyboard/Auxiliary Input Device Checkout:
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 three flexible cables extending from the keyboard are correctly seated in the connectors on the interposer card.
If the keyboard cable connection is correct, run the Keyboard Test by doing the following:
1. Go to diagnostic menu screen by pressing Ctrl+A in the Easy-Setup screen.
2. Press Ctrl+K;a layout of the keyboard appears on the screen.
3. Check that when each key is pressed, the key position on the keyboard layout on the screen changes to a black square.
Note:
When a 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 non-defective FRU.
- Reseat the three cables.
- Replace the keyboard.
- Replace the interposer 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 the above 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.
TrackPoint III Checkout:
If the TrackPoint III will not work, check the configuration in the Easy-Setup by selecting Keyboard from the Config menu. 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 re-adjustment 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 screen.
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 will not work, do the following actions one at a time to correct the problem. Do not replace a non-defective FRU.
- Reseat the three keyboard cables.
- Replace the keyboard.
- Replace the interposer card.
- Replace the system board.
Diskette Drive Test:
Do the following to isolate the problem to a controller, drive, or diskette. A scratch, write enabled, non-defective 2HD diskette is required.
Note:
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 diagnostic mode and select Tool, then select the icon FDD-1 or FDD-2 and press the space key.A| 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 the drive is attached througha Port Replicator as FDD-1 or FDD-2 and the test detects errors, move the drive to the computer's diskette drive connector directly, and test it again as FDD-1. If no errors occur at the FDD-1 position, the drive is not defective. Go to "Port Replicator Checkout" in "Common Devices Checkout" section to isolate the replicator problem.
7. If the drive is attached through an Expansion Unit, go to the service manual of the Expansion Unit to isolate the problem.
8. If the drive is attached througha Diskette Drive Attachment Unit, replace the unit.
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Hint Category |
Hardware Maintenance Information | |
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Date Created |
19-11-96 | |
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Last Updated |
19-08-98 | |
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Revision Date |
18-08-99 | |
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Brand |
IBM ThinkPad | |
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Product Family |
ThinkPad 755CE/CSE, ThinkPad 755CX, ThinkPad 755CV, ThinkPad 755CD, ThinkPad 755CDV | |
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Machine Type |
9545 | |
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Model |
Various | |
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TypeModel |
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Retain Tip (if applicable) |
N/A | |
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Reverse Doclinks |