78
Chapter 4
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 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 TravelMate 4400
Page 6: ...VI ...
Page 64: ...58 Chapter 3 ...
Page 68: ...62 Chapter 3 ...
Page 94: ...88 Chapter 5 5 Lid Switch SW2 11 Touchpad Board Connector CN8 6 Modem Cable Connector CN4 ...
Page 122: ...126 Appendix C ...