No Picture (Video_Cvbs) - Samsung LA37C630 Series Service Manual

4-1-5. No Picture (Video_CVBS)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the Video Source
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Major
Check the IC6002, IC6001(SDP84), IC7001
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checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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1
Diagnostics
2
Caution Make sure to disconnect the power before working on the IP board.
Power Indicator is off.
Lamp on, no picture.
Yes
Does the signal appear at
C6852,C6853,C6854?
Yes
Does the digital data appear at the
output of LVDS (TP7025~TP7038 ,
TP7040~TP7053)?
Yes
Check a LVDS cable?
Replace lcd panel?
No
Check a A/V cable and video signal.
No
Check a connection harness.
No
Check a IC7001
Change a main PCB ass'y
No
Please, Contact Tech support.
4. Troubleshooting
4-9