
Vostro 5402 Service Manual
System board built-in self-test (M-BIST)
About this task

Steps
- Press and hold both the M key and the power button to initiate M-BIST.
- The battery-status light illuminates in amber when there is a system board failure.
- Replace the system board to fix the issue.
NOTE:The battery status LED does not illuminate if the system board is functioning properly.
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