Lenovo ThinkPad 380ED TP 380Z Hardware Maintenance Manual (August 1998) for us - Page 32

Keyboard- or TrackPoint-Related Symptoms, LCD-Related Symptoms

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Symptom / Error Unable to communicate using the Infrared (IR) Port. FRU / Action in Sequence 1. Make sure the setup for the IR is correct. Use the ThinkPad Configurations utility. 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. Keyboard- or TrackPoint-Related Symptoms Symptom / Error FRU / Action in Sequence The keyboard (one or more keys) does not work. 1. Reseat the keyboard cable on the DC/DC card. 2. Keyboard 3. System board The TrackPoint does not work. 1. Reseat the keyboard cable on the DC/DC card. 2. Go to "TrackPoint Checkout" on page 16. 3. Keyboard 4. System board The pointer moves automatically or does not work correctly. See "TrackPoint Checkout" on page 16. LCD-Related Symptoms Important The TFT LCD for the notebook computer contains over 2,359,296 thin-film transistors (TFTs). A small number of missing, discolored, or lighted dots (on all the time) is characteristic of TFT LCD technology, but excessive pixel problems can cause viewing concerns. The LCD should be replaced if the number of missing, discolored, or lighted dots in any background is 21 or more. 30

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Symptom / Error
FRU / Action in Sequence
Unable to communicate
using the Infrared (IR) Port.
1.
Make sure the setup
for the IR is correct.
Use the ThinkPad
Configurations utility.
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.
Keyboard- or TrackPoint-Related
Symptoms
Symptom / Error
FRU / Action in Sequence
The keyboard (one or more
keys) does not work.
1.
Reseat the keyboard
cable on the DC/DC
card.
2.
Keyboard
3.
System board
The TrackPoint does not
work.
1.
Reseat the keyboard
cable on the DC/DC
card.
2.
Go to “TrackPoint
Checkout” on page
16.
3.
Keyboard
4.
System board
The pointer moves
automatically or does not
work correctly.
See “TrackPoint
Checkout” on page
16.
LCD-Related Symptoms
Important
The TFT LCD for the notebook computer contains
over 2,359,296 thin-film transistors (TFTs).
A small
number of missing, discolored, or lighted dots (on all
the time) is characteristic of TFT LCD technology, but
excessive pixel problems can cause viewing concerns.
The LCD should be replaced if the number of missing,
discolored, or lighted dots in any background is
21 or
more
.
30