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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, perform the following:
Run the advanced diagnostic test (refer to
1.
in loop mode at least 10 times.
If no error is detected, do not replace any FRU.
2.
If an error is detected, replace the FRU. Rerun the test to verify that there are no more errors.
3.
Undetermined Problems
The diagnostic problems do not identify which adapter or device failed, which installed devices are
incorrect, whether a short circuit is suspected, or whether the system is inoperative.
NOTE:
•
•
Perform the following procedures to isolate the failing FRU:
Remove power from the computer.
1.
Visually check FRUs for damage. If any problems are found, replace the FRU.
2.
Remove or disconnect all of the following devices:
3.
•
•
•
•
•
•
•
Apply power to the computer.
4.
Determine if the problem has changed.
5.
If the problem does not recur, connect the removed devices until failing FRU is found.
6.
If the problem remains, replace the following:
7.
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Troubleshooting
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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. (refer
to
Power On Issues
on page 4-3).
Non-Acer devices
Printer, mouse, and other external devices
Battery pack
Hard disk drive
DIMM
CD-ROM/Diskette drive Module
PC Cards
System board
LCD assembly
manuals search engine
System Utilities
on page 2-2) for the system board
4-18
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