IBM System x3950, Problem Determination And Service Manual

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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 8878 and 8879,” on page 109 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.
No-beep symptom Description Action
No beeps occur after
successful completion of
POST.
The power-on status is Disabled.
1. Run the Configuration/Setup Utility program
and select Start Options ; then, set
Power-On Status to Enable .
2. (Trained service technician only) Reseat the
operator information panel.
3. (Trained service technician only) Replace
the operator information panel.
No beeps occur, and
there is no video.
See “Solving undetermined problems” on page
106.
Error logs
The POST error log contains the three most recent error codes and messages that
were generated during POST. The BMC log and the system-error log contain
messages that were generated during POST and all system status messages from
the service processor.
The following illustration shows an example of a BMC log entry.
BMC System Event Log
----------------------------------------------------------
Get Next Entry
Get Previous Entry
Clear BMC SEL
Entry Number= 00005 / 00011
Record ID= 0005
Record Type= 02
Timestamp= 2005/01/25 16:15:17
Entry Details: Generator ID= 0020
Sensor Type= 04
Assertion Event
Fan
Threshold
Lower Non-critical - going high
Sensor Number= 40
Event Direction/Type= 01
Event Data= 52 00 1A
The BMC log is limited in size. When the log is full, new entries will not overwrite
existing entries; therefore, you must periodically clear the BMC log through the
Configuration/Setup Utility program (the menu choices are described in the User’s
Guide ). When you are troubleshooting an error, be sure to clear the BMC log so
that you can find current errors more easily.
Entries that are written to the BMC log during the early phase of POST show an
incorrect date and time as the default time stamp; however, the date and time are
corrected as POST continues.
Chapter 2. Diagnostics
19