Samsung UN46C7000WF Service Manual page 90

4-1-6. No Video (Video CVBS)
Symptom
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-
Major
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checkpoints
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5
Diagnostics
5
Caution Make sure to disconnect the power before working on the PD board.
Notice Refer to the next page for detailed locations.
Audio is normal but no picture is displayed on the screen.
Check the Video CVBS source
Check the Valencia
Check if the LVDS cable is loose or not.
No video
Yes
Check the video source and
check the connection of video cable?
Yes
Does the signal appear at R439?
Yes
Does the digital data appear at
pin 15~81 of CN2101?
Yes
Check the LVDS cable?
Replace the LCD panel?
Input a video signal.
No
Check the connected cable.
No Change the CN408 or
the main PCB assy.
No
Change the IC1001 or
the main PCB assembly.
No
Please, contact Tech support.
4. Troubleshooting
4-25