IBM 7379E2U User Manual - Page 33

Power-supply LEDs, Description, Action, Notes, Error

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Table 2. Power-supply LEDs 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 Notes No AC power to 1. Check the AC power to the server. the server or a problem with the AC power source 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. No AC power to 1. Replace the power supply. the server or a problem with the 2. Make sure that the power cord is AC power source and the power connected to a functioning power source. supply had detected an internal problem This happens only when a second power supply is providing power to the server. Faulty power supply Replace the power supply. Faulty power supply Replace the power supply. Power supply not 1. If the system board error (fault) LED is Typically indicates fully seated, not lit, replace the power supply. that a power supply faulty system board, or faulty power supply 2. If the system board error (fault) LED is is not fully seated. 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. Note: On models with eight 3.5-inch or sixteen 2.5-inch hard disk drives, need to upgrade power supply to 920-watt. The following illustration shows the 920-watt power-supply LEDs on the rear of the server. Chapter 1. The System x3400 M3 server 17

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Table 2. Power-supply LEDs
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.
If the system board error (fault) LED is
not lit, replace the power supply.
2.
If the system board error (fault) LED 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.
Note:
On models with eight 3.5-inch or sixteen 2.5-inch hard disk drives, need to
upgrade power supply to 920-watt.
The following illustration shows the 920-watt power-supply LEDs on the rear of the
server.
Chapter 1. The System x3400 M3 server
17