Dc Power-Supply Leds - Lenovo System x3550 M3 Problem Determination And Service Manual

AC power-supply LEDs
Error (!)
AC DC
On Off
On Off
On On

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.
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.
Description
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
-48V -48V return
Ground
Action
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.
Replace the power supply.
Replace the power supply.
Notes
Typically indicates a
power-supply is not
fully seated.
.
Chapter 3 Diagnostics
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