IBM Aptiva 2187, Service Manual

Page: 102 / 161

2-40
Undetermined Problems
If an error code is present, go to “Index of Symptoms, Messages, Error
Codes, or Beeps” on page 2-8. If no error code is present, continue with this
check. Check the power supply voltages (see “Power Supply Cable
Connector Specifications" on page 5-7). 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 5-1 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