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DC power-supply LEDs
Error (!)
IN OK
OUT OK
On
On
Off
Off
Off
Off
Off
On
Off
On
On
Off
On
Off
On
On
System pulse LEDs
The following LEDs are on the system board and monitors the system power-on and power-off sequencing
and boot progress.
See
"System-board LEDs" on page 21
System x3550 M3Problem Determination and Service Guide
394
Description
Off
Normal operation
No dc power to the
Off
server or a
problem with the
dc power source.
On
No dc power to the
server or a
problem with the
dc 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
for the location of these LEDs.
Action
1. Check the dc 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.
• Make sure that the power cord
is connected to a functioning
power source.
• Replace the power supply (see
the documentation that comes
with the power supply for
instructions).
Replace the power supply.
Replace the power supply.
1. (Trained service technician
only) 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 dc
power is present.
Typically indicates a
power-supply is not
fully seated.
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