Lenovo ThinkServer RD220 Hardware Maintenance Manual page 52

The following illustration shows the locations of the power-supply LEDs.
The following table describes the problems that are indicated by various combinations of the ac
power-supply LEDs and the power-on LED on the operator information panel and suggested actions to
correct the detected problems.
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• See Chapter 7 "Parts listing, ThinkServer RD220 Type 3729, 3779, 3797, and 3798" on page 205 to determine
which components are customer replaceable units (CRU) and which components are field replaceable
units (FRU).
• If an action step is preceded by "(Trained service technician only)," that step must be performed only by
a trained service technician.
Power-supply LEDs
AC DC Error
Off Off Off
Off Off On
Off On Off
Off On On
On Off Off
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ThinkServer RD220 Hardware Maintenance Manual
Description Action
No ac power to
1. Check the ac power to the server.
the server or a
2. Make sure that the power cord is
problem with the
connected to a functioning power source.
ac power source.
No ac power 1. Replace the power supply.
to the server or
2. Make sure that the power cord is
a problem with
connected to a functioning power source.
the ac power
source and the
power supply
had detected an
internal problem.
Faulty power Replace the power supply.
supply
Faulty power Replace the power supply.
supply
Power supply 1. Reseat the power supply.
not fully seated,
2. If the 240V Failure LED on the system
faulty system
board is lit, have the system board
board, or faulty
replaced.
power supply
3. If the 240V Failure LED on the system
board is not lit, replace the power supply.
Notes
Normal condition
when no ac power is
present.
This only happens
when a second
power supply is
providing power to
the server.
Typically indicates a
power supply is not
fully seated.