Table 11. Light path diagnostics panel LEDs (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 a action step is preceded by "(Trained technician only)," that step must be performed only by a trained
technician.
LED Description Action
CPU An invalid microprocessor
configuration or a microprocessor
has failed (both the CPU LED
and the CONFIG LED might be
lit).
1. If the CONFIG LED is lit, the system issues an invalid
microprocessor configuration error. Complete the
following steps to correct the problem:
a. Check the microprocessors that were just installed to
make sure that they are compatible with each other
(see “Replacing a microprocessor and heat sink” on
page 349 for additional information about
microprocessor requirements) and use the Setup utility
and select System Information → System Summary →
Processor to verify the microprocessors information.
b. (Trained technician only) Replace the incompatible
microprocessor.
c. Check the system-event logs for information about the
error. Replace any components that are identified in
the error log.
2. If the CPU LED is lit and the CONFIG LED is not lit,
complete the following steps:
a. (Trained technician only) Make sure that the failing
microprocessor, which is indicated by a lit LED on the
system board, is installed correctly. See “Replacing a
microprocessor and heat sink” on page 349 for
information about installation and requirements.
When only the CPU LED is lit, a
microprocessor has failed.
If the CONFIG LED is not lit, a microprocessor failure occurs,
complete the following steps to correct the problem:
1. (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. See
“Replacing a microprocessor and heat sink” on page 349
for information about installation and requirements.
2. (Trained technician only) Replace the failing
microprocessor (see “Removing a microprocessor and heat
sink” on page 347 and “Replacing a microprocessor and
heat sink” on page 349).
3. For more information, go to http://www.ibm.com/
systems/support/supportsite.wss/
docdisplay?brandind=5000008&lndocid=SERV-CALL.
112 System x3530 M4 Type 7160: Installation and Service Guide
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