Lenovo System x3550 M3 - DC Power-Supply Leds

AC power-supply LEDs
Description
Action NotesAC DC
Error (!)
On Off Off
Power-supply not
fully seated, faulty
system board, or
faulty power-
supply
1. Reseat the power supply.
2. If a power channel error LED
on the system board is not lit,
replace the power-supply
(see the documentation that
comes with the power supply
for instructions).
3. If a power channel error LED
on the system board is lit,
(trained service technician
only) replace the system
board.
Typically indicates a
power-supply is not
fully seated.
On Off On
Faulty power-
supply
Replace the power supply.
On On On
Power-supply is
faulty but still
operational
Replace the power supply.
DC power-supply LEDs
Use this information to view DC power-supply LEDs.
The following illustration shows the locations of the power-supply LEDs on the dc power supply.
-48V return
Ground
-48V
Power input LED
Power output LED
Power error LED
Figure 18. DC power-supply LEDs
The following table describes the problems that are indicated by various combinations of the power-supply
LEDs on a dc power supply and suggested actions to correct the detected problems.
Chapter 3. Diagnostics 393