Problem Cause Possible Solution
3. Verify that the power supply cables are connected to
the system board.
4. Verify power supply functionality:
a. Disconnect AC power.
b. Remove internal power supply cables from the
system board.
c. Plug in AC power.
●
If the power supply fan spins and the BIST
LED illuminates (see
Testing power supply
on page 118), the power supply is good.
Replace the system board.
●
If the power supply fan does not spin or the
LED does not illuminate (see
Testing power
supply on page 118), replace the power
supply.
Solving power supply problems
This section presents power supply troubleshooting scenarios.
Testing power supply
Before replacing the power supply, use the Built-In Self-Test (BIST) feature to learn if the power supply
still works.
Table 5-2 Minor problems (continued)
118 Chapter 5 System diagnostics and troubleshooting ENWW
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