AC power-supply LEDs
AC
DC
Error (!)
Description
Action
Notes
On
On
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
Off
The power supply
has failed.
Replace the power supply.
Off
On
On
The power supply
has failed.
Replace the power supply.
On
Off
Off
Power-supply not
fully seated, faulty
system board, or
the power supply
has failed.
1. Reseat the power supply.
2. Follow actions in the “Power
3. If the OVER SPEC LED on
the light path diagnostics is
lit, follow the actions in “Light
path diagnostics LEDs” on
page 124.
4. If the OVER SPEC LED on
the light path diagnostics is
not lit, check the error LEDs
on the system board and the
IMM2 error messages. Follow
steps in “Power problems” on
page 148 and “Solving power
problems” on page 156 until
the problem is solved.
Typically indicates a
power-supply is not
fully seated.
On
Off
On
The power supply
has failed.
Replace the power supply.
On
On
On
The power supply
has failed.
Replace the power supply.
DC power-supply LEDs
Use this information to view DC power-supply LEDs.
The following illustration shows the locations of the power-supply LEDs on the dc power supply.
130
System x3550 M4 Installation and Service Guide
Summary of Contents for x3550 M4
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