IBM PC 300 Maintenance Service Manual page 62

Table 2-3 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
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 Make sure that the system is not in power saving mode.
See "Power Management Setup" on page 48.
not run but power
supply fan runs.
With the system power on, measure the voltage of
processor fan connector FN. (See "Power Supply Cable
Connector Specifications" on page 127 and refer to
Parts/Test Point Locations on page 111.) Its reading should
be +12Vdc.
Processor fan.
System board.
Processor test Processor.
failed.
System board.
System Board
NOTE: Ensure that the memory modules are installed properly and the contact
lead is clean before diagnosing any system problems.
Memory test failed. "Memory" on page 74
System board
Incorrect memory Insert the memory modules in the DIMM sockets properly,
size shown or and then reboot the system.
repeated during
Memory module. See the "Step 005" of "Memory" on page
POST.
74 to replace memory module.
System board.
System works but Load default settings.
fails to enter power
In Win98, check settings in Control Panel Power utility.
saving mode when
Reload software from Recovery CD.
the "Power
Management" is set
to [Enabled], and
power saving timer
set in BIOS has
elapsed.
System hangs "Index of Symptoms, Messages, Error Codes, or Beeps" on
before system boot. page 57.
"Undetermined Problems" on page 80.
System hangs after Execute a system test ("Diagnostics/All Tests" in PC-
system boot. Doctor diagnostics program) and set it to stop at "Halt on
Error" to see the potential cause of the problem.
"Undetermined Problems" on page 80.
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