No Picture (Video_Cvbs) (Sx1) - Samsung LA22C450E1 Service Manual

4-1-5. No Picture (Video_CVBS) (SX1)

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 M-star
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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
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
C507, C509 of IC1102?
Yes
Check a LVDS cable ?
Replcelcd panel?
Yes
Please, Call to Samsung Co. LTD.
No
Check a A/V cable and video signal.
No
Check a connection harness.
4. Troubleshooting
4-9