Ch4. Symptom-to-part index
Indeterminate problems
·You are here because the diagnostic tests did not identify which adapter or device failed, wrong devices are installed, a short circuit is suspected, or the system is inoperative.
Follow these procedures to isolate the failing FRU (do not isolate FRUs that have no defects).
·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.
1.Power off the computer
2.Visually check each FRU for damage. Replace any damaged FRU.
3.Remove or disconnected all of the following devices :
a.
b.Printer, mouse, and other external devices.
c.Battery pack.
d.PC cards.
e.ODD
f.
Note
Use the other memory card because it needs when operating computer.
4.Power on the computer.
5.Determine whether 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 FRUs one at a time. (do not replace a
a.LCD assembly (Check external monitor whether the same problem recurs or not).
b.Keyboard.
c.Keydeck (TouchPad and Scroll Button assembly).
d.System board.
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