No Video_Video Cvbs (A Type) - Samsung UN32C4000PD Service Manual

4-1-7. No Video_Video CVBS (A Type)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the Video CVBS source
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Major
Check the Chelsea.
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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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4
2
Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the video source and
check the connection of video cable?
Yes
Does the CVBS data appear at
TP - COMP1_Y ?
Yes
Does the digital data appear at
TP - O_TXCLK+, O_TXCLK-,
F_TXCLK+, F_TXCLK- ?
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
No
Check a set in the 'Stand-by mode'.
No
Input the video source properly.
Check CN701.
No
Change the Main Assy.
Check IC301 (SX1).
No
Change the Main Assy.
No Please, Contact Tech support.
4. Troubleshooting
4-17