Undetermined Problems - Acer TRAVELMATE 7730 Service Manual

Undetermined problems

If the diagnostic test may not identify which adapter or device failed, which installed devices are
incorrect, whether a short circuit is suspected, or whether the system is inoperative. Use these
procedures to isolate the failing FRU (do not isolate a non-defective FRU).
Note:
Note:
To isolate a failing FRU:
Turn off the notebook.
1
Visually check FRU parts for damage. If you identify any damage, replace the FRU.
2
Remove or disconnect all of the following devices:
3
Non-Acer devices
❑
Printer, mouse, and other external devices
❑
Battery pack
❑
Hard disk drive(s)
❑
SO-DIMM
❑
Optical drive
❑
PC Cards and Type 54 ExpressCards
❑
Turn on the notebook.
4
Determine if the problem has changed.
5
If the problem does not recur, reconnect the removed devices one at a time
❑
until you find the failing FRU.
If the problem does recur, replace the following FRUs one at a time:
❑
❑
❑
Important:
Chapter 4: Troubleshooting
Verify that all attached devices are supported by the notebook.
Verify that the power supply being used at the time of the failure is
operating correctly. (See "Testing the power system" on page
System board
LCD assembly
Do not replace a non-defective FRU.
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