IBM 7945E2U User Manual - Page 36

AC power-supply LEDs, Description, Action, Notes, Error

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Table 2. Power-supply LEDs AC power-supply LEDs AC DC Error Off Off Off Off Off On Off On Off Off On On On Off Off On Off or On Flashing On On Off On On On Description Action 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. Turn the server off and then turn the server back on. 4. If the problem remains, replace the power supply. No ac power to the server or a problem with the ac power source and the power supply had detected an internal problem 1. Replace the power supply. 2. Make sure that the power cord is connected to a functioning power source. Faulty power supply Replace the power supply. Faulty power supply Replace the power supply. Power supply not 1. (Trained service technician only) fully seated, Reseat the power supply. faulty system board, or faulty 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. Faulty power supply Replace the power supply. Normal operation Power supply is faulty but still operational 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 that a power supply is not fully seated. The following table describes the problems that are indicated by various combinations of the power-supply LEDs on a dc power supply and suggested actions to correct the detected problems. 20 System x3650 M3 Types 4255, 7945, and 7949: Installation and User's Guide

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Table 2. Power-supply LEDs
AC power-supply LEDs
Description
Action
Notes
AC
DC
Error
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.
Turn the server off and then turn the
server back on.
4.
If the problem remains, replace the
power supply.
This is a normal
condition when no
ac power is present.
Off
Off
On
No ac power to
the server or a
problem with the
ac power source
and the power
supply had
detected an
internal problem
1.
Replace the power supply.
2.
Make sure that the power cord is
connected to a functioning power
source.
This happens only
when a second
power supply is
providing power to
the server.
Off
On
Off
Faulty power
supply
Replace the power supply.
Off
On
On
Faulty power
supply
Replace the power supply.
On
Off
Off
Power supply not
fully seated,
faulty system
board, or faulty
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.
Typically indicates
that a power supply
is not fully seated.
On
Off or
Flashing
On
Faulty power
supply
Replace the power supply.
On
On
Off
Normal operation
On
On
On
Power supply is
faulty but still
operational
Replace the power supply.
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs on a dc power supply and suggested
actions to correct the detected problems.
20
System x3650 M3 Types 4255, 7945, and 7949: Installation and User’s Guide