Light Path Diagnostics Leds - IBM LS20 - BladeCenter - 8850 Service Manual

Light path diagnostics LEDs

The following table describes the LEDs on the light path diagnostics panel and on
the system board, 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 See Chapter 3, "Parts listing, Type 8850," on page 53 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 light path
diagnostics LED Description
None An error has occurred and cannot be isolated,
or the service processor has failed.
DIMM x error A memory error occurred.
Microprocessor x The microprocessor has failed.
error
MIS The microprocessors do not match.
(Microprocessor
mismatch)
NMI (NMI error) The system board has failed.
S BRD (System The system board has failed
board error)
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AMD Opteron LS20 Type 8850 for IBM BladeCenter: Problem Determination and Service Guide
Action
An error has occurred that is not represented
by a light path diagnostics LED. Check the
BMC log for more information about the error.
1. Make sure that the DIMM indicated by the
lit LED is supported.
2. Reseat the DIMM indicated by the lit LED.
3. Replace the DIMM indicated by the lit LED.
Note: Multiple DIMM LEDs do not necessarily
indicate multiple DIMM failures. If more than
one DIMM LED is lit, reseat or replace one
DIMM at a time until the error goes away.
Refer to the Hardware Maintenance Manual
and Troubleshooting Guide or Problem
Determination and Service Guide for your
BladeCenter unit type for further isolation.
1. Make sure that the microprocessor
indicated by the lit LED is installed
correctly. (See "Microprocessor" on page
78 for installation instructions.)
2. (Trained service technician only) Replace
the microprocessor indicated by the lit LED.
Make sure that microprocessors 1 and 2 are
identical (number of cores, cache size and
type, clock speed, internal and external clock
frequencies); also, see "Troubleshooting tables"
on page 27.
1. Replace the blade server cover, reinsert
the blade server in the BladeCenter unit,
and then restart the blade server.
2. Check the BMC log for information about
the error.
(Trained service technician only) If the problem
remains, replace the system board assembly.
1. Replace the blade server cover, reinsert
the blade server in the BladeCenter unit,
and then restart the server.
2. (Trained service technician only) Replace
the system board assembly.