Power-supply LEDs

This section describes the power-supply LEDs on the rear of the server and the suggested actions to correct the detected problems.

The following minimum configuration is required for the server to start:

For the locations of the LEDs and connectors on the rear of the server, see Rear view.

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.

The power-supply LEDs table with two rows of column headings for the AC power-supply LEDs combination of AC, DC, and Error, and one row of column headings for the description, action, and notes.
ac power LED dc power LED Power-supply error LED Description Action
On On Off Normal operation No action needed.
Off Off Off No ac power to the server or a problem with the ac power source.

This symptom is a normal condition when no ac power is present.
  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.
On Off Off Faulty system board or faulty power supply

The symptom typically indicates that a power supply is not fully seated. This is a normal condition before turning on the system.
  1. Turn off the server and disconnect the power cord from the server; then, reconnect the power cord.
  2. If the system board error (fault) LED is not lit, replace the power supply.
  3. (Trained technician only) If the system board error LED is lit, replace the system board.
On Off or Flashing On Faulty power supply Replace the power supply.
On On On Power supply is faulty but still operational. Replace the power supply.
Parent topic: Diagnostic tools