Acer KB.I140A.074 Technical Information download pdf (Page 82)

76 Chapter 4

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 non-defective FRU).

NOTE: Verify that all attached devices are supported by the computer.

NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power

System Check” on page 61):

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:

z Non-Acer devices

z Printer, mouse, and other external devices

z Battery pack

z Hard disk drive

z DIMM

z CD-ROM/Diskette drive Module

z PC Cards

4. Power-on the computer.

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 non-defective FRU:

z System board

z LCD assembly

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 99 100

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Acer KB.I140A.074 Technical Information Page 82