Samsung UD6400 Training Manual page 57

Trouble Shooting - No Video (Video CVBS)
Lamp(Backlight) on, no video ?
check the connection of video cable?
at output of IC801 (Arsenal)?
Check the LVDS clk signal at output of
Replace the T-con / LCD panel?
Power indicator LED is off.
YES
Check the video source and
YES
Check the CVBS signal
at Input of IC801(Arsenal) ?
AV1 R501 : AV1_CVBS
AV2 R505 : AV2_CVBS
YES
Check the CVBS clk signal
R807 : ASN_CVBS_CLK
YES
Main board.(TX)
TX2_CLK : LV_TX2_DN/DP
TX4_CLK : LV_TX4_DN/DP
YES
Check the LVDS cable?
No
Check a set in the 'Stand-by mode'
NO
Input the video source properly
NO Check CN502 or CN501.
Change the Main Ass'y.
Check IC1001(GenoaS) and
NO
IC2001(Parma).
Change the Main Ass'y.
Check IC1001(GenoaS) and
NO
IC2001(Parma).
Change the Main Ass'y.
NO
Please, Contact Tech support.