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Symptom/Error FRU/Action
LCD screen
unreadable, or
Characters missing
pels, or
Screen abnormal, or
Wrong color displayed.
1. See note for “LCD
Related Symptoms.”
2. Reseat all LCD
connectors
3. LCD Assembly
4. System Board
5. Interposer Card
LCD has extra horizontal or
vertical lines displayed.
LCD Assembly
Model 755CV Symptoms
Symptom/Error FRU/Action
The screen is black
when the LCD cover
is installed.
1. Verify that the LCD cover is
firmly installed on the LCD.
2. Diagnose the LCD assembly
by following “LCD Related
Symptoms” on page 413.
The LCD is wavy
when the computer is
placed on the
overhead projector.
Some overhead projectors
interfere with the LCD of the
computer. Use another
overhead projector.
The LCD stays on
even when the LCD
cover is removed.
Make sure that the switch on the
rear of the LCD is not stuck. If
it is stuck, release it with the tip
of a ball-point pen.
Abnormal
screen
Uneven color on
the screen
Spot on the
screen
1. Check that the white film on
the LCD cover is clean.
Gently wipe the film with a
dry, soft cloth, such as a
lens cleaner.
2. LCD Cover
3. Diagnose the LCD assembly
by following “LCD Related
Symptoms” on page 413.
Note: The customer may be
responsible for repair costs if the
LCD cover was damaged due to
misuse, excessive force, scratch,
or liquid spilled by the customer.
The computer has an
intermittent problem
when you use it on
the overhead
projector.
Problem such as high
environmental temperature
might be the cause. Use the
stand supplied with the
computer.
414 IBM Mobile Systems HMM