Chapter 4
115
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.
Summary of Contents for Aspire 2420
Page 6: ...VI ...
Page 10: ...X Table of Contents ...
Page 48: ...38 Chapter 1 ...
Page 106: ...96 Chapter 3 ...
Page 120: ...110 Chapter 4 F5h Boot to Mini DOS F6h Clear Huge Segment F7h Boot to Full DOS Code Beeps ...
Page 127: ...Chapter 5 117 Top View Jumper and Connector Locations Chapter 5 ...
Page 128: ...118 Chapter 5 Bottom View ...
Page 162: ...Appendix A 152 ...
Page 166: ...156 Appendix B ...
Page 168: ...158 Appendix C ...