Intermittent problems

Intermittent system hang problems can be due to a variety of causes 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 problem recurs.

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 FRUs.

3.     If any error is detected replace the FRU shown by the

FRU code. Rerun the test to verify that no more errors

exist.