IBM 79463AU Installation And User Manual page 46

Power-supply LEDs
AC DC
Off Off
Off Off
Off On
Off On
On Off
On Off
On On
On On
The following illustration shows the locations of the power-supply LEDs on the dc
power supply.
Power output LED
30
IBM System x3550 M2 Types 4198 and 7946: Installation and User's Guide
Error Description
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
Off Normal operation
On Power-supply is
faulty but still
operational
Power input LED
Power error LED
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 the 240 V failure LED on
the system board is not lit,
replace the power-supply.
3. If the 240 V failure LED on
the system board is lit,
(trained service technician
only) replace the system
board.
Replace the power supply.
Replace the power supply.
-48V Ground -48V return
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.