No Video (Video Cvbs) - Samsung LN26A330J1D Service Manual

4-1-6. No Video (Video CVBS)

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