Solving power supply problems
Testing power supply
Before reseating or replacing the power supply, use the BIST feature to determine if the power supply
still works.
To test the power supply:
1. Disconnect AC power to the workstation.
2. Disconnect all internal power supply cables.
3. Plug in AC power.
a. If the green BIST LED on the rear of the workstation is lit and the fan is spinning, the power
supply is functional.
b. If the green BIST LED is not lit or the fan is not spinning, replace the power supply.
Figure 6-1 BIST LED
Table 6-4 Power supply problems
Problem Cause Solution
Power supply shuts down
intermittently.
Power supply fault. Replace the power supply.
140 Chapter 6 System diagnostics and troubleshooting ENWW
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