AC power-supply LEDs

Use this information to view AC power-supply LEDs.

The following minimum configuration is required for the DC LED on the power supply to be lit:

Note: You must turn on the server for the DC LED on the power supply to be lit.
The following illustration shows the locations of the power-supply LEDs on the ac power supply.
Figure 1. AC power-supply LEDs
AC power-supply LEDs
The following table describes the problems that are indicated by various combinations of the power-supply LEDs on an ac power supply and suggested actions to correct the detected problems.

The power-supply LEDs table with two rows of column headings for the AC power-supply LEDs combination and one row of column headings for the description, action, and notes.

AC power-supply LEDsDescriptionActionNotes
AC DC Error (!)
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. Restart the server. If the error remains, check the power-supply LEDs.
  4. If the problem remains, replace the power-supply.
This is a normal condition when no ac power is present.
Off OffOnThe power supply has failed.Replace the power supply. 
OffOnOffThe power supply has failed.Replace the power supply. 
Off OnOnThe power supply has failed.Replace the power supply. 
OnOffOffPower-supply not fully seated, faulty system board, or the power supply has failed.
  1. Reseat the power supply.
  2. Follow actions in Power problems.
  3. Follow actions in Solving power problems until the problem is solved.
Typically indicates a power-supply is not fully seated.
OnOffOnThe power supply has failed.Replace the power supply. 
OnOnOnThe power supply has failed.Replace the power supply. 
Parent topic: Power-supply LEDs