No Picture (Video_Cvbs) - Samsung LN22C450E1M Service Manual

4. Troubleshooting

4-1-6. 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 SETD-10 (SX1)
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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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Diagnostics
1
2
Caution Make sure to disconnect the power before working on the IP board.
4-10
Power Indicator is off.
Lamp on, no picture.
Yes
Does the signal appear at
R799(AV1)/L701_SAV(AV2)?
Yes
Does the digital data appear at the
output of LVDS Signal?
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 IC1102.
Change a main PCB ass'y.
No
Please, Contact Tech support.