Lenovo System x3550 M4 Installation And Service Manual page 144

AC power-supply LEDs
AC DC Error (!)
On On
Off Off
Off Off
Off On
Off On
On Off
On Off
On On
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
Description
Off Normal operation.
No ac power to the
Off
server or a problem
with the ac power
source.
On The power supply
has failed.
Off The power supply
has failed.
The power supply
On
has failed.
Off Power-supply not
fully seated, faulty
system board, or
the power supply
has failed.
On The power supply
has failed.
On The power supply
has failed.
Action
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.
Replace the power supply.
Replace the power supply.
Replace the power supply.
1. Reseat the power supply.
2. Follow actions in the "Power
problems" on page 148.
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.
Replace the power supply.
Replace the power supply.
Notes
This is a normal
condition when no ac
power is present.
Typically indicates a
power-supply is not
fully seated.