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No.
Symptom
White/Grey on
whole
5
screen(Nothing on
screen)
6
Dark screen
Screen's display
7
range is incorrect
8
Screen is distorted
Part of colors(R/G/B)
is not displayed.
9
Black line appears in
vertically
10
No sound
Check Points
Is the wire harness between main PCB
1
and LCD module secured firmly ?
2 Is the LCD module defective ?
3 Is the main PCB defective ?
Is the wire harness between inverter
1
and a LCD module secured firmly ?
Is the wire harness between one of
2
inverters and main PCB secured firmly
?
Is the display circuit on main PCB
3
defective ?
Is the adjustment for screen performed
1
correctly ?
Is the output level on image from a
2
computer not agreeable to LCD's
specification ?
3 Is the size of screen set correctly ?
Is the adjustment for screen performed
1
correctly ?
2 Is a signal cable connected securely ?
3 Is a sigil cable extended ?
Is the output level on image from a
4
computer not agreeable to LCD's
specification ?
Is the Image Processing circuit on
5
main PCB defective ?
1 Is a signal cable connected securely ?
Is the connection between main PCB
2
and a LCD module securely ?
Is the Image Processing circuit on
3
main PCB defective ?
Is the audio cable connected securely
1
?
Is the position of audio volume at the
2
minimum position ?
Is the volume setting for an audio
3
equipment adequately ?
Is the wire harness between main PCB
4
and Audio PCB securely ?
Is the wire harness between Audio
5
PCB and Volume PCB securely ?
- 5 -
Treatments
Check the connection of wire
harness
Replace a LCD module with the
new one
Replace the main PCB with the
new one
Ensure the connection of a wire
harness
Ensure the connection of a wire
harness
Replace the main PCB with the
new one
Adjust the screen correctly
Check the specification of a
computer
Set the size of screen
again(refer to User's Manual for
computer)
Adjust the screen correctly
Check the connection of a signal
cable
Don't extend a signal cable
Check the specification of a
computer
Replace the main PCB with the
new one
Check the connection of a signal
cable
Check the connector
Replace the main PCB with the
new one
Ensure the connection of the
audio cable
Set the audio volume at the
appropriate position
Refer to the user's manual for an
audio equipment
Ensure the connection of a wire
harness
Ensure the connection of a wire
harness
Class
B
B
B
B
B
B
A
C
A
A
A
A
C
B
A
B
B
A
A
A
B
B
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