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Power-supply LEDs

This section shows the power-supply LEDs on the server.

The following illustration shows the power-supply LEDs on the rear of the server.

Figure 1. Power-supply LEDs
Power-supply LEDs

The following table describes the problems that are indicated by various combinations of the power-supply LEDs and suggested actions to correct the detected problems.

Table 1. Power-supply LEDs status and required action.

Four column table for illustrating power-supply LEDs status, description, action and notes.

Power-supply LEDsDescriptionActionNotes
AC (green)DC (green)Error (yellow)
OnOnOffNormal operation  
OffOffOffNo ac power to the server or a problem with the ac power source
  1. Check the ac power to the server.
  2. Make sure that the power cord is connected to a functioning power source.
  3. Turn the server off and then turn the server back on.
  4. If the problem remains, replace the power supply.
This is a normal condition when no ac power is present.
OffOffOnNo ac power to the server or a problem with the ac power source and the power supply had detected an internal problem
  1. Replace the power supply.
  2. Make sure that the power cord is connected to a functioning power source.
This happens only when a second power supply is providing power to the server.
OffOnOffFaulty power-supplyReplace the power supply. 
OffOnOnFaulty power-supplyReplace the power supply. 
OnOffOffPower supply not fully seated, faulty system board, faulty power supply, or system not power-on
  1. Reseat the power supply.
  2. Replace the power supply.
  3. (Trained service technician only) Replace the system board.
Typically indicates that a power supply is not fully seated.
OnOff or FlashingOnFaulty power supplyReplace the power supply. 
OnOnOnPower supply is faulty but still operationalReplace the power supply.