83Intermittent ProblemsIntermittent system hang problems can be caused by a variety of reasons that have nothingto do with a hardware defect, such as: cosmic radiation, electrostatic discharge, or softwareerrors. FRU replacement should be considered only when a recurring problem exists. Whenanalyzing an intermittent problem, perform 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 an error is detected, replace the FRU. Rerun the test to verify that there are no moreerrors.
