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v One PCI riser-card assembly in PCI riser connector 1
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs on an AC power supply and suggested
actions to correct the detected problems.
AC power-supply LEDs
AC
DC
On
On
Off
Off
Off
Off
Off
On
Off
On
On
Off
On
On
System pulse LEDs
The following LEDs are on the system board and monitor the system power-on and
power-off sequencing and boot progress:
Table 4. System pulse LEDs
LED
RTMM heartbeat
Error (!)
Description
Off
Normal operation.
Off
No ac power to the
server or a problem
with the ac power
source.
On
The power supply
has failed.
Off
The power supply
has failed.
On
The power supply
has failed.
On
The power supply
has failed.
On
The power supply
has failed.
Description
Power-on and power-off
sequencing.
Action
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.
Replace the power supply.
Replace the power supply.
Replace the power supply.
Replace the power supply.
Replace the power supply.
Action
1. If the LED blinks at 1Hz, it is functioning
properly and no action is necessary.
2. If the LED is not blinking, (trained service
technician only) replace the system board.
Notes
This is a normal
condition when no ac
power is present.
189
Chapter 3. Diagnostics
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