Samsung UD6400 Training Manual page 59

Trouble Shooting - No Video (Component)
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the component source and check the
connection of component cables(Y,Pb,Pr) ?
Does the component data appear at ?
Comp1 Y : R537
Check the LVDS clk signal at output of
Main board.(TX)
TX2_CLK : LV_TX2_DN/DP
TX4_CLK : LV_TX4_DN/DP
Check the LVDS cable?
Replace the T-con / LCD panel?
YES
YES
Pb : R544
Pr : R542
YES
YES
No
Check a set in the 'Stand-by mode'
NO
Input the component source properly.
NO
Check CN501 or Compnent gender.
Change the Main Assy
Check IC1001(GenoaS) and
NO
IC2001(Parma).
Change the Main Ass'y.
NO
Please, Contact Tech support.