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11.198 bytes |
Service Hints & Tips |
Document ID: GSMH-3BCGRB |
TP 355,360,370,750,755C/CS - Options Checkout
Applicable to: World-Wide
System Board and Processor Card Checkout (370C, 750Ce, 755C, 755Cs):
The processing functions for the Models 370C, 750C, 755Ce, and 755Cs 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 then 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 Easy-Setup screen.
2. Press Ctrl+K; the figure 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 be a black square.
Note:
When a Fn key is pressed, the 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 II checkout:
If the TrackPoint II will not work, check the configuration in Easy-Setup by selecting Keyboard from the Config menu. If the configuration of the TrackPoint II disabled, select TrackPoint to enable it. If this does not correct the TrackPoint II problem, continue with the following.
The TrackPoint II 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 II 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 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.
Pen and Digitizer Checkout (360P, 360PE, 750P):
To check the stylus pen and digitizer, do the following:
1. Press and hold the F1 key.
2. Power-on the computer to go to Easy-Setup screen.
3. Select Test by using the stylus pen.
4. If the test menu appears, the pen and digitizer are operating correctly.
If the menu does not appear, do the following:
a. Do the 'Digitizer Adjustment´.
b. If the problem remains, replace the stylus pen.
c. If the problem still remains after step 6 in the adjustment, replace the LCD assembly.
Digitizer Adjustment:
Adjust the pen-point pressure when:
- The LCD is replaced with a new one.
- The LCD is changed to a pen LCD from a monochrome model.
- The stylus pen or digitizer is not working correctly.
Do the following:
1. Press and hold the F1 key, then power-on the computer to go to the Easy-Setup menu.
2. Press Ctrl+P. The following Pen icon appears on the screen.
3. Open the LCD all the way to 180 degrees. (Do not convert it into the tablet-style notebook.)
4. Select the pen icon by moving the cursor on the icon and clicking it.
5. Without applying any pressure on the screen, hold the stylus pen so it stands on the screen, then press Enter.
Note:
The pressure on the screen should only be from the weight of the stylus pen.
6. Restart the system.
Audio Card Checkout:
Do the following to run the audio tests.
Note:
Refer to 'Product Overview´ to see whether the audio card is standard or not.
1. Power-off the computer.
2. Insert the ThinkPad 750Ce hardware maintenance diskette into diskette drive A and power-on the computer.
Note:
You can use this maintenance diskette for all Models.
3. Select the Audio Diagnostics from the main menu.
4. Select Tests from the menu bar and press Enter.
5. Select All tests from the pull-down menu and press Enter.
Run options are set to test once and stop on error as defaults. Other options can be selected by the pull-down menu of Setting-up.
6. Follow the instructions that appear on the screen to proceed with the tests.
7. If the tests end and no errors are detected, the 'All tests passed OK´ message appears.
8. If an error is detected, the FRU code and error description message appear. Go to 'FRU Codes´ and replace the FRU.
9. To exit from the test screen, press Esc.
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.
Warning:
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.
1. Do the following to select the test device:
a. Select the advanced diagnostic mode and select Tool;
b. 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 through a 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 through a Diskette Drive Attachment Unit, replace the unit.
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Hint Category |
Hardware Maintenance Information | |
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Date Created |
12-11-96 | |
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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 355, ThinkPad 360, ThinkPad 370, ThinkPad 750, ThinkPad 755C/CS | |
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Machine Type |
2620, 9545, 2619 | |
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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 |