IBM System x3550 M3 Type 4254 Installation And User Manual page 44

AC power-supply LEDs
AC DC
On On
Off Off
Off Off
Off On
Off On
On Off
On Off
On On
The following illustration shows the locations of the power-supply LEDs on the dc
power supply.
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IBM System x3550 M3 Types 4254 and 7944: Installation and User's Guide
Error (!) Description
Off Normal operation
Off No ac power to the
server or a problem
with the ac power
source.
On No ac power to the
server or a problem
with the ac power
source and the
power-supply had
detected an internal
problem.
Off Faulty
power-supply
On Faulty
power-supply
Off Power-supply not
fully seated, faulty
system board, or
faulty power-supply
On Faulty
power-supply
On Power-supply is
faulty but still
operational
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. Replace the power-supply.
v Make sure that the power cord
is connected to a functioning
power source.
v Replace the power supply.
Replace the power supply.
Replace the power supply.
1. Reseat the power supply.
2. If a power channel error LED
on the system board is not lit,
replace the power-supply
(see the documentation that
comes with the power supply
for instructions).
3. If a power channel error LED
on the system board is lit,
(trained service technician
only) replace the system
board.
Replace the power supply.
Replace the power supply.
Notes
This is a normal
condition when no ac
power is present.
This happens only
when a second power
supply is providing
power to the server.
Typically indicates a
power-supply is not
fully seated.