IBM Aptiva 2124 Hardware Maintenance Service page 78

Table 2- 2 Error Symptoms List
Error Symptoms
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.
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.
Processor test failed.
NOTE: Ensure that the memory modules are installed properly and the
contact leads are clean before diagnosing any system problems.
Memory test failed.
Incorrect memory size shown
or repeated during POST.
2-14
Action/FRU
Processor / Processor Fan
Ensure that the system is not in power saving
mode. See "Power Management" on page 1-
17.
With the system power on, measure the
voltage of processor fan connector FN1 (see
"Machine Type 2153/K6 System Board " on
page 5-3 or see "Machine Type
2153/Celeron System Board Layout" on page
5-8). Its reading should be +12Vdc.
Processor fan.
System board.
Processor.
System board.
System Board and Memory
"Memory" on page 2-33.
System board
"Insert the memory modules in the DIMM
sockets properly, then reboot the system.
Memory module. See the "Step 005" of
"Memory" on page 2-33 to replace memory
module.
System board.