Chapter 4 205USB (Right Up/Down Side) FailureIf the right-side USB fails, perform the following actions one at a time to correct the problem. Do not replacenon-defective FRUs:Other FailuresIf the CRT Switch, Dock, LAN Port, external MIC or Speakers, PCI Express Card, 5-in-1 Card Reader orVolume Wheel fail, perform the following general steps to correct the problem. Do not replace non-defectiveFRUs:1. Check Drive whether is OK.2. Check Test Fixture is ok.3. Swap M/B to Try.Intermittent ProblemsIntermittent system hang problems can be caused by a variety of reasons that have nothing to do with ahardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacementshould 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.StartCheck USB/B toM/B cableRe-assemble theUSB/B cable to M/BOKNGCheck USB/BOKSwap USB/B andUSB cableOKNGSwap M/B
