Power-supply LEDs

This topic provides the location of the 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 4-socket server to start:

• One compute book and one 4 GB DIMM in DIMM connector 9.
• The standard I/O book
• The storage book
• One power supply
• Power cord

The following minimum configuration is required for the 8-socket (x3950 X6) server to start:

• A minimum of four compute books (two in each node) with E7-8xxx microprocessors. The microprocessors must be of the same cache size, type, and clock speed.
• The 8-socket chassis
• Two standard I/O books
• Two storage books
• A minimum of four power supplies (two power supplies in each node)

The following illustration shows the locations of the power-supply LEDs.

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.

Table 1. Problems indicated by power-supply LEDs and the Power-on LED on the front operator panel and the suggested actions to solve the problems.

Table with six columns and headers with the first row spanned across the first three columns that provides information to solve power supply problems

Power-supply LEDs			Description	Action	Notes
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.	This is a normal condition when no ac power is present.
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.
Off	On	On	Faulty power-supply	Replace the power supply.
On	Off	Off	The system is off: The system is connected to power.		The server is functioning correctly.
			The system is on: Power-supply not fully seated, faulty standard I/O book, or faulty power-supply.	Reseat the power supply. Replace the power-supply. Replace the standard I/O book.	Typically indicates a power-supply is not fully seated.
On	Off	On	Faulty power-supply	Replace the power supply.
On	On	On	Power-supply is faulty	Replace the power supply.