No Video (S-Video 1, 2) - Samsung LN32A450C1D Service Manual

4-1-7. No Video (S-Video 1, 2)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the S-Video 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
9
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 and C3023?
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 JA806S or Side-AV
No
Change the main PCB ass'y or
Side-AV assembly
Check IC3001
No
Change the main PCB assembly
Check IC4001
No
Change the main PCB assembly
No
Please, Contact Tech support
4. Troubleshooting
4-13