LED
Description
Action
4. If the problem remains,
replace the power supply.
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 Power Configurator
utility to ensure that current
system power consumption
is under limitation. For
more information and to
download the utility, go to
http://www-03.ibm.com/
systems/bladecenter/
resources/powerconfig.html.
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 1 Hz rate, the PSU is at STANDBY mode. That is, no dc power
output is from this PSU.
System pulse LEDs
Use this information to diagnose possible errors that are indicated by the system pulse LEDs.
The following LEDs are on the system board and help you to monitor the system power-on and power-off
sequencing and boot progress (see “System-board LEDs” on page 25 for the location of these LEDs).
Table 6. System pulse LEDs
LED
Description
Action
FPGA heartbeat
Power-on and power-off
sequencing
1. If the LED blinks at 1 Hz, it is functioning
properly and no action is necessary.
2. If the LED is not blinking, (trained technician
only) replace the system board.
IMM heartbeat
IMM2.1 heartbeat boot process
The following steps describe the different stages
of the IMM2.1 heartbeat sequencing process.
1. When this LED is blinking fast
(approximately 4 Hz), this indicates
that the IMM2.1 code is in the loading
process.
2. When this LED goes off momentarily, this
indicates that the IMM2.1 code has loaded
completely.
3. When this LED goes off momentarily and
then starts blinking slowing (approximately
56
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