Modem-Related Symptom; Operating System-Related Symptom; Intermittent Problems - IBM 1200 Hardware Maintenance Manual

Symptom/Error
Parallel port device
problems.

Modem-Related Symptom

Symptom/Error
Internal modem does not
work correctly

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 an 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.
46
ThinkPad i Series 1200/1300 HMM
FRU/Action in Sequence
v Device driver
v Device cable
v Device
v Ensure that "Parallel Port" in the
"Onboard Devices Configuration"
menu of the BIOS Utility is correctly
set.
v System board
FRU/Action in Sequence
v Go to "FRU tests" on page 98.
v Modem connector
v Modem board
v System board
FRU/Action in Sequence
v
Check that the operating system
has no failure and is installed
correctly.
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