Table 13. Power-supply LEDs
AC Power-supply LEDs
AC
DC
Error
Description
Action
Notes
On
On
Off
Normal operation
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
Faulty power-supply.
1. Make sure that
the power cord
is connected to a
functioning power
source.
2. Replace the power
supply.
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. Reseat the power
supply.
2. If the system board
error LED is not lit,
replace the power
supply.
3. (Trained technician
only) If the system
board error LED is lit,
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
On
Power supply is faulty but
still operational
Replace the power supply.
System pulse LEDs
This section describes the system pulse LEDs on the system board that monitors the system power-on and
power-off and boot progress.
The following LEDs are on the system board and monitor the system power-on and power-off sequencing
and boot progress (see “System-board LEDs and controls” on page 28 for the location of these LEDs).
138
System x3500 M5 Installation and Service Guide
Summary of Contents for System x3500 M5 Type 5464
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