104
Undetermined Problems
If an error code is present, go to “Index of Symptoms,
Messages, Error Codes, or Beeps” on page 74. If no error code
is present, continue with this check. Check the power supply
voltages (see “Power Supply Cable Connector Specifications"
on page 129). If the voltages are correct, return here and
continue with the following steps:
1. Power off the system unit.
2. Perform the following checks, one by one, until you have
isolated the problem FRU (refer to "Parts/Test Point
Locations" on page 122 for locations):
q Load default settings in setup.
q Check all system board jumper positions and switch
settings.
q Check all adapter card jumper positions.
q Check all device jumper positions.
q Check all cables and connectors for proper installation.
If the jumpers, switch, and voltage settings are correct, return
here and continue:
3. Remove or disconnect the following, one at a time:
q Non-IBM devices
q External devices
q Any adapters
q Modem card, if installed
q CD-ROM drive
q Diskette drive
q Hard disk drive
q DIMM
q Processor
q System board
4. Power on the system unit.
5. Repeat steps 1 through 4 until you find the failed device or
adapter.
6. If software related, reload software from service partition.
If the symptom changes, go to “Index of Symptoms, Messages,
Error Codes, or Beeps” on page 74 or to the check procedure
for the last item tested.
Replace the last item tested if the system operates normally
after removing the last item.