Lenovo THINKSERVER 3821 - Manual (Page 90)

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See the Chapter 8, “Parts Listing, TD200x Machine Types 3719, 3821, 3822, and 3823,” on page 237 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.
Lit EasyLED
diagnostics LED with
the system-error or
information LED also
lit
Description Action
VRM A VRM has failed.
1. Check the system-event log to determine the
reason for the lit LED (for a VRM).
2. Determine whether the CNFG LED is also lit. If the
CNFG LED is lit, the memory configuration is
invalid. Reseat the VRM.
3. If the CNFG LED is not lit, reseat the following
components:
a. Failing VRM
b. (Trained service technician only)
Microprocessor associated with the VRM
4. Replace the following components one at a time,
in the order shown, restarting the server each time:
a. Failing VRM
b. (Trained service technician only)
Microprocessor associated with the VRM
c. (Trained service technician only) System board
Microprocessor (CPU) A microprocessor has failed, or an
invalid microprocessor configuration
is installed.
Note: (Trained service technician
only) Make sure that the
microprocessors are installed in the
correct sequence. 1. Check the system-event log to determine the
reason for the lit LED.
2. Determine whether the CNFG LED is also lit. If the
CNFG LED is not lit, a microprocessor has failed.
a. Make sure that the failing microprocessor,
which is indicated by the CPU1 or CPU2 error
LED on the system board, is installed correctly.
b. Replace the following components one at a
time, in the order shown, restarting the server
each time:
1) (Trained service technician only) Failing
microprocessor
2) (Trained service technician only) System
board
c. If the CNFG LED is lit and the CPU mismatch
LED on the system board is also lit, an invalid
microprocessor configuration is installed:
1) Make sure that the microprocessors are
compatible with each other. They must
match in speed and cache size. Use the
Setup utility to compare the microprocessor
information.
2) (Trained service technician only) Replace
the incompatible microprocessor.
82 ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual