Power supply LEDs
This topic provides information about various power supply LED status and corresponding action
suggestions.
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.
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. Replace the power
supply.
Off Off On
No input power to the power
supply or the power supply
has detected an internal
problem.
1. Make sure that the power
cord is connected to a
functioning power
source.
2. 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.
Chapter 5. Problem determination 289
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