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