Symptom/Error
FRU/Action in Sequence
Printer problems.
Run printer self-test.
Printer driver
Printer cable
Ensure that "Parallel Port" in
the "Onboard Devices Config-
uration" menu of the BIOS
Utility is correctly set.
System board
Serial or parallel port
device problems.
Device driver
Device cable
Device
Ensure that "Serial Port" and
"Parallel Port" in the
"Onboard Devices Configura-
tion" menu of the BIOS Utility
is correctly set.
System board
Modem-Related Symptoms
Symptom/Error
FRU/Action in Sequence
Internal modem does
not work correctly
Go to “FRU tests” on
page 48.
Modem connector
Modem board
System board
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 consid-
ered when a recurring problem exists.
When analyzing the 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 inop-
erative. 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.
38
ThinkPad i Series 1400/1500 HMM
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