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
NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power System Check” on page 59):
1.
2.Visually check them for damage. If any problems are found, replace the FRU.
3.Remove or disconnect all of the following devices:
z
zPrinter, mouse, and other external devices
zBattery pack
zHard disk drive
zDIMM
z
zPC Cards
4.
5.Determine if the problem has changed.
6.If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7.If the problem remains, replace the following FRU one at a time. Do not replace a
zSystem board
zLCD assembly
74 | Chapter 4 |