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Peripheral-Device-Related Symptoms
Symptom / Error FRU / Action in Sequence
External display does not
work correctly.
1. See “External Display
Self-Test” in
“Common Devices
Checkout” section.
Printer problems. 1. Run Printer Self-test.
2. Parallel port device
3. Cable
4. System board
Serial or parallel port device
problems.
1. Device
2. Device cable
3. System board
Infrared-Related Symptoms
Symptom / Error FRU / Action in Sequence
Unable to communicate
using the Infrared (IR) Port.
1. Make sure the setup
for the IR is correct.
2. Make sure there are
no fluorescent lights
near the computer.
The computer may
receive optical noise
from the fluorescent
light.
3. Run the advanced
diagnostic test. If an
error occurs and a
FRU code is displayed,
replace the parts
shown by the FRU
code.
Other Symptoms
Note: If you cannot find a symptom or error in this list
and the problem remains, see “Undetermined Problems”
on page 209.
Symptom / Error FRU / Action in Sequence
Errors occur only when Port
Replicator is used.
See “Port Replicator
Checkout” on page 196.
PCMCIA slot pin is
damaged.
PCMCIA Slot Assembly
208 IBM Mobile Systems - ThinkPad HMM Volume 3