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2. TROUBLESHOOTING
Check the following for troubles of LCD monitor.
No.
Symptom
No Picture with
1
Power Indicator OFF
No Picture with
2
Power Indicator in
Amber
No Picture with
3
Power Indicator in
Green
No Picture with
4
Power Indicator
blinking in Green
Check Points
1 Is the Power "ON" to a LCD Monitor ?
2 Is an AC Adapter defective?
Is the wire harness between main PCB
3
and DC IN PCB secured firmly ?
Is the Power Supply circuit on main
4
PCB defective ?
1 Is the Power "ON" to a Computer ?
2 Is a computer standing by ?
Is the Image Processing circuit on
3
main PCB defective ?
Is a screen saver programming
1
running ?
2 Is a signal cable connected securely ?
Disconnected a signal cable ? or Bent
3
a terminal pin ?
Is the computer's signal timing not
4
agreeable to the LCD's specification ?
Is the wire harness between Inverter
5
PCB and a LCD module secured firmly
?
Is the wire harness between main PCB
6
and Inverter PCB secured firmly ?
Is the wire harness between main PCB
and SW/LED PCB or main PCB and
7
Brightness control volume connected
securely ?
Is the Brightness control volume
8
defective ?
9 Is the LCD module defective ?
10 Is the Inverter unit defective ?
Is the display circuit on main PCB
11
defective ?
1 Is a computer standing by ?
2 Is a signal cable connected securely ?
Disconnected a signal cable ? or Bent
3
a terminal pin ?
Check AC outlet, AC cord, DC
Jack and Power switch for a
LCD monitor
Replace an AC Adapter with the
new one
Check the connection
Replace the main PCB with the
new one
Check the Power Supply for a
Computer
Be out of standing by condition,
by operating to a computer
Replace the main PCB with the
new one
Press any key or touch the
mouse, to end the screen saver
program
Check the connection of a signal
cable
Replace a signal cable with the
new one
Adjust the computer's signal
timing, if possible
Check the connection of wire
harness
Check the connection of wire
harness
Ensure the connection of a wire
harness
Replace the Volume PCB with
new one, and check the screen
Replace a LCD module with the
new one
Replace an Inverter unit with the
new one
Replace the main PCB with the
new one
Be out of standing by condition,
by operating to a computer
Check the connection of a signal
cable
Replace a signal cable with the
new one
- 4 -
Treatments
Class
A
B
B
B
A
A
B
A
A
C
A
B
B
B
B
B
B
B
A
A
C
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