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4. Troubleshooting
4-1-2. No Video (Analog PC signal)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Check the PC source
-
Major
Check the IC601(chelsea)
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Caution
Make sure to disconnect the power before working on the IP board.
Diagnostics
1
2
4-6
Power Indicator is off.
Lamp(Backlight) Off, no video
Yes
Check the PC source and
check the connection of DSUB?
Yes
Does the signal appear at pin1,2,3,13,14
(R,G,B,H,V) of CN1204?
Yes
Dose the digital data appear at output
of IC501?
Yes
Check the LVDS cable?
Replace the LCD panel?
Input an analog PC signal.
No
Check the connected cable.
No
Change the PC cable. Change the main
PCB assembly
No
Check IC501 Change the main PCB
No
Please, contact Tech support
PC cable.
assembly
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