Power supply LEDs

The different states of the power supply light-emitting diodes (LEDs) can be used to identify or verify a power supply that you are servicing.

The power supply has three LEDs that indicate the power supply status: an ac power LED (green), a dc power LED (green), and an error and identify function LED (amber).

To locate the power supply LEDs, look on the top or at the back of an exposed power supply. You might have to remove covers or panels to expose the power supply. Follow the instructions to remove covers or panels for the power supply you are working with, and then return here.

To activate the identify function, see Identifying a failing part.

Descriptions for the states of the power supply LEDs follow:

• If both the ac power and dc power (green) LEDs are on solid (not blinking) and the error and identify function (amber) LED is off, the power supply is operating correctly.
• If the ac power LED is on, the dc power LED is blinking, and the error and identify function (amber) LED is off, then the system is turned off, but the power supply is still connected to the power source.
• If the error and identify function (amber) LED is blinking, the power supply is not operating correctly or the identify function has been selected.