IBM 2274 User Manual
Page 79
Check Procedures 45
T
able 2-3 Error Symptoms List
NOTE:
To diagnose a problem, first find the error symptom
in the left column. If directed to a check procedure,
replace the FRU indicated in the check procedure. If
no check procedure is indicated, the first Action/
FRU listed in right column is the most likely cause.
Error Symptoms
Action/FRU
Processor / Processor Fan
NOTE:
Normally, the processor fan should be operative,
and the processor clock setting should be exactly
set to match its speed requirement before
diagnosing any processor problems.
Processor fan does not run
but power supply fan runs.
1. Ensure that the system is
not in power saving mode
and the “Stop CPU clock
in sleep state” is not set
to Yes. See “Power
Management” on page 5.
2. With the system power
on, measure the voltage
of processor fan
connector FN2. Its
reading should be
+12Vdc. See “System
Board Jumpers and
Connectors” on page
109.
3. Processor fan.
4. System board.
Processor test failed.
1. Processor.
2. System board.
System Board and Memory
NOTE:
Ensure that the memory modules are installed
properly and the contact leads are clean before
diagnosing any system problems.
Memory test failed.
65.
2. System board