The dc LED is not lit but ac LED is lit

If the dc LED is not lit for a power supply, the problem could be in the power supply or the power supply bay.

Problem

For a power supply, the ac LED is lit, but the dc LED is not lit.

Investigation

Perform these steps to resolve the problem:

1. Log on to the advanced management module and view the event log to determine if there are any power-related error messages. If so, contact IBM support.
2. Swap this power supply with another supply that is working correctly. If the ac and dc leds are lit for the swapped power supply, replace the other power supply.
3. If the dc LED on the replacement power supply is not lit, or if multiple power supplies have the ac LED on and dc LED off, remove the SPC chassis and reinsert it.
   Note

   The System Power and Cooling chassis (SPC chassis) is a field-replaceable unit (FRU). Therefore, it should be removed only by a trained service technician.
4. If the problem persists, contact IBM support.