Chapter 4
121
Intermittent Problems
Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a
hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement
should be considered only when a recurring problem exists.
When analyzing an intermittent problem, do the following:
1.
Run the advanced diagnostic test for the system board in loop mode at least 10 times.
2.
If no error is detected, do not replace any FRU.
3.
If any error is detected, replace the FRU. Rerun the test to verify that there are no more errors.
Undetermined Problems
If the diagnostic test does not identify the problem, follow these procedures to isolate the failing 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 On
Issue” on page 108):
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:
•
Non-Acer devices
•
Printer, mouse, and other external devices
•
Battery pack
•
Hard disk drive
•
DIMM
•
CD-ROM/Diskette drive Module
•
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:
•
System board
•
LCD assembly
Summary of Contents for Aspire One AOP531h
Page 6: ...VI ...
Page 10: ...X Table of Contents ...
Page 41: ...Chapter 2 31 Clear User or Supervisor Password 1 Open the RAM door 2 Short RTC_RST ...
Page 83: ...Chapter 3 73 Pull the cable completely away from the bezel ...
Page 95: ...Chapter 3 85 4 Replace the four screws and screw caps ...
Page 107: ...Chapter 3 97 The upper cover is now ready to attach to the bottom cover ...
Page 109: ...Chapter 3 99 Turn the unit over and affix the five screws in the top cover ...
Page 115: ...Chapter 3 105 Replacing the SIMM Card Insert the SIMM Card into the slot ...
Page 130: ...120 Chapter 4 ...
Page 138: ...128 Chapter 4 ...
Page 152: ...142 Chapter 6 ...
Page 153: ...Chapter 6 143 ...
Page 267: ...257 Appendix A ...
Page 268: ...Appendix A 258 ...
Page 274: ...264 Appendix B ...
Page 276: ...266 Appendix C ...
Page 280: ...270 ...