AC power-supply LEDs
Description Action NotesAC 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. Restart the server. If the error
remains, check the
power-supply LEDs.
4. If the problem remains,
replace the power-supply.
This is a normal
condition when no ac
power is present.
Off Off On The power supply
has failed.
Replace the power supply.
Off On/
Blinking
Off The power supply
has failed.
Replace the power supply.
Off On/
Blinking
On The power supply
has failed.
Replace the power supply.
On Off Off Power-supply not
fully seated, faulty
system board, or
the power supply
has failed.
1. Reseat the power supply.
2. Use the IBM Power
Configurator utility to ensure
current system power
consumption is under
limitation. For more
information and to download
the utility, go to
http://www.ibm.com/
systems/bladecenter/
resources/powerconfig.html.
3. Check the error LEDs on the
system board and the IMM2
error messages. Follow steps
in “Power problems” on
page 100 and “Solving power
problems” on page 111 until
the problem is solved.
Typically indicates a
power-supply is not
fully seated.
On Off On The power supply
has failed.
Replace the power supply.
On On/
Blinking
On The power supply
has failed.
Replace the power supply.
Note: When the DC LED is blinking at a 1Hz rate, the PSU is at STANDBY mode, i.e. no DC power output from
this PSU.
Chapter 3. Troubleshooting 79
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