Acer 5540 Series Service Manual

Also see for Aspire 5540: User guide User guide Service guide

Contents

Acer 5540 Series Service Manual Manual pdf 92 page image

86 Chapter 4Undetermined ProblemsThe 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 “PowerSystem Check” on page 71.):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:T Non-Acer devicesT Printer, mouse, and other external devicesT Battery packT Hard disk driveT DIMMT CD-ROM/Diskette drive ModuleT PC Cards4. 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:T System boardT LCD assembly