Samsung LN32A450C1D - No Video (Video CVBS)

4-11
4. Troubleshooting
4-1-6. No Video (Video CVBS)
Symptom Audio is normal but no picture is displayed on the screen.-
Major
checkpoints
Check the Video CVBS source
Check the MSD2248AL
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Check JA804S or Side-AV
Change the main PCB ass’y or
Side-AV Ass’y
No
Power Indicator is off.
Lamp(Backlight) Off, no video
No
Check the video source and
check the connection of
video cable?
Check IC3001
Check IC3001
Change the main PCB assembly
No
Does the signal appear at
C3022~C3024 of IC3001?
Does the digital data appear at output
of R5006~R5020, R5022~R5029?
Check IC4001
Change the main PCB assembly
No
Does the digital data appear at output
of R3082F~R3095F?
Does the signal appear at C3025 of
IC3001?
No
Please, Contact Tech support
Check the LVDS cable?
Replace the LCD panel?
Yes
Yes
Yes
Input a video signal.
Check the connected cable.
Yes
6
6
Yes
7
Yes
Caution Make sure to disconnect the power before working on the IP board.