AC power-supply LEDs:
Use this information to view AC power-supply LEDs.
The following minimum configuration is required for the DC LED on the power
supply to be lit:
v Power supply
v Power cord
Note: You must turn on the server for the DC LED on the power supply to be lit.
The following illustration shows the locations of the power-supply LEDs on the ac
power supply.
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs on an ac power supply and suggested
actions to correct the detected problems.
AC power-supply LEDs
Description Action NotesAC DC Error (!)
On On /
Blinking
Off Normal operation.
Off Off Off No ac power to the
server or a problem
with the ac power
source.
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.
This is a normal
condition when no ac
power is present.
Off Off On The power supply
has failed.
Replace the power supply.
Off On /
Blinking
Off The power supply
has failed.
Replace the power supply.
Off On /
Blinking
On The power supply
has failed.
Replace the power supply.
Figure 28. AC power-supply LEDs
70 IBM System x3550 M5 Type 5463: Installation and Service Guide