Lenovo ThinkServer TS200 6522 Hardware Maintenance Manual page 71

Before you work inside the server to view the LEDs, read "Important Safety Information" on page 1 and
"Handling static-sensitive devices" on page 129.
If an error occurs, view the server LEDs in the following order:
1. Check the control-panel assembly on the front of the server. If the system-error LED is lit, it indicates
that an error has occurred.
2. Check the front and rear of the server to determine whether any component LEDs are lit.
3. Remove the server cover and look inside the server for lit LEDs. Certain components inside the server
have LEDs that will be lit to indicate the location of a problem. For example, a DIMM error will light
the LED next to the failing DIMM on the system board.
Look at the system service label inside the side cover of the server, which gives an overview of
internal components. This information can often provide enough information to correct the error.
The following table describes the LEDs on the system board and PCI extender cards 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 If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Component LED Description
DIMM error LEDs A memory DIMM has failed or is
incorrectly installed.
Fan error LEDs A fan has failed, is operating too
slowly, or has been removed.
Microprocessor error Microprocessor has failed, is
LED missing, or has been incorrectly
installed.
Note: (Trained service technician
only) Make sure that the
microprocessor is installed correctly;
see "Replacing the microprocessor
and fan sink" on page 182.
System-board error System-board microprocessor VRD
LED and/or power voltage regulators
have failed.
Battery failure LED Battery low.
Action
1. Remove the DIMM that has the lit error LED.
2. Reseat the DIMM.
3. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. DIMM
b. (Trained service technician only) System board
1. Reseat the failing fan, which is indicated by a lit
LED near the fan connector on the system board.
2. Replace the failing fan.
1. Check the system-event log to determine the
reason for the lit LED.
2. (Trained service technician) Reseat the failing
microprocessor
3. Replace the following components one at a time,
in the order shown, restarting the server each
time:
a. (Trained service technician only) Failing
microprocessor
b. (Trained service technician only) System board
(Trained service technician only) Replace the system
board.
1. Replace the CMOS lithium battery, if necessary.
2. (Trained service technician only) Replace the
system board.
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Chapter 4. Diagnostics