Power supply LEDs

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

• Power supply

• Power cord

• Appropriate input power from the power source

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

• 16 GB DIMM

• Two processors installed

• At least one 2.5-inch drive installed

• One power supply

• Power cord

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

Power supply LEDs			Description	Action	Note
AC	DC	Error
On	On	Off	Normal operation		The server is functioning correctly.
Off	Off	Off	No ac power to the server, a problem with the ac power source, or a power supply has failed.	Check the ac power to the server. Make sure that the power cord is connected to a functioning power source. Restart the server. If the error remains, check the power-supply LEDs. Replace the power supply.
Off	Off	On	No input power to the power supply or the power supply has detected an internal problem.	Make sure that the power cord is connected to a functioning power source. Replace the power supply.	This happens only when a second power supply is providing power to the server.
Off	On	Off	The power supply has failed.	Replace the power supply.
On	Blinking	Off	The power supply is in zero output mode (standby). When the total power consumption is low, only one of the power supplies delivers the entire power, while the other is put into this mode.	Zero output advanced mode is on by default, and the standby power supply unit will function normally when power consumption increases. To disable zero output mode, choose F1 -> System Settings -> Power -> Zero Output -> Disable.
Off	On	On	Faulty power supply.	Replace the power supply.
On	Off	Off	The system is off: The system is connected to power.	Reseat the power supply unit. Replace the power supply unit.	PSU should be ON initially when AC input is ready.
			The system is on: Power supply not fully seated, faulty standard I/O book, or faulty power supply.	Reseat the power supply unit. Replace the power supply unit. Replace the standard I/O book.	It usually indicates the power supply is not fully seated.
On	Off	On	Faulty power supply.	Replace the power supply.
On	On	On	Faulty power supply.	Replace the power supply.