Gateway EC38, Service Manual

Page: 81 / 118

www.gateway.com
75
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.
•
If any error is detected, replace the FRU.
•
If no error is detected, do not replace any FRU.
2
Rerun the test to verify that there are no more errors.
Undetermined Problems
The diagnostic problems does not identify which adapter or device failed,
which installed devices are incorrect, whether a short circuit is suspected, or
whether the system is inoperative.
Follow these procedures to isolate the failing FRU (do not isolate a
non-defective FRU).
To isolate a failing FRU:
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:
•
Non-Gateway devices
•
Printer, mouse, and other external devices
•
Battery pack
•
Hard disk drive(s)
•
DIMM
•
CD-ROM/Diskette drive Module
•
PC Cards
4
Power-on the computer.
5
Determine if the problem has changed.
Important
Verify that all attached devices are supported by the computer.
Important
Verify that the power supply being used at the time of the failure is
operating correctly. ( See “Power System Check” on page 60. )