Chapter 4
111
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 mainboard 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.
SG_Aspire4920_Book.book Page 111 Monday, May 28, 2007 6:49 PM
Summary of Contents for Aspire 4920
Page 10: ...x ...
Page 50: ...40 Chapter 1 ...
Page 58: ...48 Chapter 2 ...
Page 94: ...84 Chapter 3 19 Carefully detach the RTC battery from the SD card slot ...
Page 105: ...Chapter 3 95 17 Remove the microphones ...
Page 106: ...96 Chapter 3 ...
Page 123: ...Chapter 5 113 System Block Diagram System Block Diagram and Connector Locations Chapter 5 ...
Page 126: ...116 Chapter 5 Switch Setting Short R525 to clear password ...
Page 130: ...120 Chapter 4 Aspire 4920 Exploded Diagram ...
Page 139: ...Chapter 4 129 ...
Page 141: ...131 Appendix A ...
Page 142: ...Appendix A 132 ...
Page 148: ...138 Appendix B ...
Page 150: ...140 Appendix C ...