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IBM ThinkPad R30 Hardware Maintenance Manual: Operating System-related Symptom; Intermittent Problems; Undetermined Problems

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Operating System-Related Symptom

Symptom/Error
Operating system not
found
Intermittent Problems
Intermittent system hang problems can be caused by a
variety of reasons that have nothing to do with a hardware
defect, such as cosmic radiation, electronic discharge, or
software errors. FRU replacement should only be
considered when a recurring problem exists.
When analyzing on intermittent problem, do the following:
1. Run the diagnostic test for the system board at least
10 times.
2. If no error is detected, do not replace any FRUs.
3. If any error is detected, replace the FRU. Rerun the
test to verify that there are no more errors.
Undetermined Problems
The diagnostic tests did not identify which adapter or
device failed, which installed devices are incorrect, whether
a short circuit is suspected, or whether the system is
inoperative. Follow the procedures below to isolate the
failing FRU.
Verify that the power supply being used at the time of the
failure is operating correctly.
1. Power off the computer.
2. Check the cables, wires, and connectors for short
circuits and open circuits. Visually check them for
damage. If any problems are found, replace the FRU.
3. Remove or disconnect all of the following devices:
v Non-IBM devices
52
ThinkPad R30 and R31 HMM
FRU/Action in Sequence
v
Check that the operating system
has no failure and is installed
correctly.
v
Check the Boot device list in the
startup/Boot sub-menu is enabled
on each bootable device.
v Enter IBM BIOS Setup Utility and
see whether the hard disk drive
and the diskette drive are properly
identified.
v Reseat the hard disk drive.
v Reinstall the operating system.
v Diskette drive
v Hard disk drive
v System board

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