Table 43. LED indicators, corresponding problem causes, and corrective actions (continued)
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 technician only)," that step must be completed only by a trained
technician.
LED Problem Action
CPU When only the CPU LED is lit, a
microprocessor has failed. When
both the CPU and CONFIG LEDs
are lit, the microprocessor
configuration is invalid.
1. If the CONFIG LED is not lit, a microprocessor failure
occurs, complete the following steps:
a. (Trained technician only) Make sure that the failing
microprocessor and its heat sink, which are indicated
by a lit LED on the system board, are installed
correctly.
b. (Trained technician only) Replace the failing
microprocessor.
c. For more information, go to http://www.ibm.com/
systems/support/supportsite.wss/
docdisplay?brandind=5000008&lndocid=SERV-CALL.
2. If the CONFIG LED and the CPU LED are lit, the system
issues an invalid microprocessor configuration error.
Complete the following steps to correct the problem:
a. Check the microprocessors that were installed to make
sure that they are compatible with each other.
b. (Trained technician only) Replace the incompatible
microprocessor.
c. Check the system-error logs for information about the
error. Replace any component that is identified in the
error log.
MEM When only the MEM LED is lit, a
memory error has occurred.
When both the MEM and
CONFIG LEDs are lit, the
memory configuration is invalid.
Note: Each time that you install or remove a DIMM, you
must disconnect the file module from the power source; then,
wait 10 seconds before you restart the file module.
1. If the CONFIG LED is not lit, the system might detect a
memory error. Complete the following steps to correct the
problem:
a. Update the file module firmware to the latest level.
For more information, see the Problem Determination
and Service Guide.
b. Reseat or swap the DIMMs.
c. Check the system-event log in the Setup utility or
IMM error messages. For more information, see the
Problem Determination and Service Guide.
d. Replace the failing DIMM.
2. If the MEM LED and the CONFIG LED are lit, check the
system-event log in the Setup utility or IMM error
messages. For more information, see the Problem
Determination and Service Guide.
Chapter 3. Getting started troubleshooting 83
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