IBM Aptiva, Hardware Maintenance Manual, Page: 70 / 282

Check Procedures 2-17
Table 2- 2 Error Symptoms List
Error Symptoms Action/FRU
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.
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.
Ensure that the system is not in power saving
mode. See “Power Management” on page 1-
25.
With the system power on, measure the
voltage of processor fan connector FN1 (see
"2137 System Board on page 5-5 or see
2138 System Board Layout on page 5-15).
Its reading should be +12Vdc.
Processor fan.
System board.
Processor test failed. Processor.
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. “Memory” on page 2-35.
System board
Incorrect memory size shown
or repeated during POST.
“DIMM Configurations" on page 5-28.
“Memory” on page 2-35
System works but fails to
enter power saving mode
when the Power Saving
Mode is set to [Enabled],
and power saving timer set
in BIOS has elapsed.
System board.