Table 2. 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 an action step is preceded by "(Trained technician only)," that step must be performed only by a trained
technician.
LED Description Action
Microprocessor
When only the Microprocessor
LED is lit, a microprocessor has
failed.
If the Configuration LED is not lit, a microprocessor failure
occurs, complete the following steps:
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
“Installing a second microprocessor and heat sink” on
page 98 for information about installation and
requirements.
2. (Trained technician only) Replace the failing
microprocessor (see “Installing a second microprocessor
and heat sink” on page 98).
3. If the failure remains, go to http://www.ibm.com/systems/
support/supportsite.wss/docdisplay?brandind=5000008
&lndocid=SERV-CALL.
Microprocessor + Configuration
When both the Microprocessor
and Configuration LEDs are lit,
the microprocessor configuration
is invalid.
If the Configuration LED and the Microprocessor LED are lit,
the system issues an invalid microprocessor configuration
error. Complete the following steps to correct the problem:
1. Check the microprocessors that were just installed to
make sure that they are compatible with each other (see
“Installing a second microprocessor and heat sink” on
page 98 for additional information about microprocessor
requirements) and use the Setup utility and select System
Information → System Summary → Processor Details to
verify the microprocessors information.
2. (Trained technician only) Replace the incompatible
microprocessor.
3. Check the system-error logs for information about the
error. Replace any component that is identified in the error
log.
18 IBM System x3500 M4 Type 7383: Installation and User’s Guide
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