System Pulse Leds - Lenovo System x3500 M5 Type 5464 Installation And Service Manual

Table 13. Power-supply LEDs
AC Power-supply LEDs
AC DC
On On
Off Off
Off Off
Off On
Off On
On Off
On Off or
Flashing
On On

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
Error Description
Normal operation
Off
Off No ac power to the server
or a problem with the ac
power source.
On Faulty power-supply.
Faulty power supply
Off
On Faulty power supply
Off Power supply not fully
seated, faulty system
board, or faulty power
supply
On Faulty power supply
On Power supply is faulty but
still operational
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.
1. Make sure that
the power cord
is connected to a
functioning power
source.
2. Replace the power
supply.
Replace the power supply.
Replace the 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.
Replace the power supply.
Replace the power supply.
Notes
This is a normal
condition when no
ac power is present.
This happens only
when a second power
supply is providing
power to the server.
Typically indicates that
a power supply is not
fully seated.