No Video_Video Cvbs (X4) - Samsung LA22C450E1 Service Manual

4-1-5. No Video_Video CVBS (X4)

Symptom Audio is normal but no picture is displayed on the screen.
-
Check the Video CVBS source
-
Major
Check the Chelsea.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
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 TP-SIDE_AV_CVBS ?
Yes
Does the digital data appear at
TP-E_TXCLK+, E_TXCLK-,
O_TXCLK+, O_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 CN1101, CN1105_SAV.
No
Change the Main Assy.
Check IC3002 (X4).
No
Change the Main Assy.
No Please, Contact Tech support.
4. Troubleshooting
4-21