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Service Hints & Tips |
Document ID: LWIK-3YGNKP |
TP 600/E - Undetermined and intermittent symptoms
Applicable to: World-Wide
The following information is intended for IBM Dealers and Authorized Servicers only. Customers attempting to follow any of the procedures below may void their warranty.
Intermittent 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 be considered only when a recurring problem exists. When analyzing an 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 no more errors exist.
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 these procedures 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 in the HMM):
1. Power off the computer.
2. Visually check them for damage. If any problems are found, replace the FRU.
3. Remove or disconnect all of the following devices:
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Hint Category |
Hardware Maintenance Information | |
Date Created |
19-09-98 | |
Last Updated |
19-01-99 | |
Revision Date |
19-01-2000 | |
Brand |
IBM ThinkPad | |
Product Family |
ThinkPad 600, ThinkPad 600E | |
Machine Type |
2645, 2646 | |
Model |
Various | |
TypeModel |
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