Lenovo 6431, Hardware Maintenance Manual

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The following table describes the problems that are indicated by various
combinations of the power supply LEDs and the power-on LED on the front
information panel and suggested actions to correct the detected problems.
v Follow the suggested actions in the order in which they are listed in the Action
column until the problem is solved.
v
See Chapter 3, “Parts listing, ThinkServer TS100 Machine Types 6431, 6432, 6433,
and 6434,” on page 37 to determine which components are customer replaceable
units (CRU) and which components are field replaceable units (FRU).
v
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 Front
information
panel power-on
LED Description Action
AC DC
Off Off Off No 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. Remove one power supply at a
time.
Lit Off Off DC source or
power supply
power problem.
1. Make sure that the power supply is
connected to the power backplane.
2. Remove and replace one power
supply at a time.
3. View the system-error log (see
“Error logs” on page 133).
Lit Lit Off Standby power
problem.
1. View the system-error log (see
“Error logs” on page 133).
2. Remove one power supply at a
time.
3. (Trained service technician only)
Replace the power backplane.
Lit Lit Flashing System
power-on
problem.
1. View the system-error log (see
“Error logs” on page 133).
2. Make sure that the power cables
are seated correctly.
3. Press the power-control button on
the control-panel.
4. Remove the optional Remote
Supervisor Adapter II SlimLine, and
try to turn on the server.
5. (Trained service technician only)
Reseat the system board.
6. (Trained service technician only)
Replace the system board.
Lit Lit Lit The power is
good. No action is necessary.
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ThinkServer TS100 Types 6431, 6432, 6433, and 6434: Hardware Maintenance Manual