DVD is playing but you don't see it on the tv

pls check dvd AV cabel .
if ok
then
playing dvd first and see dvd back side pin .
VIDEO OUT
after see on your dvd remot cantrol and check interface key if yes then use key to set display on screen S-VIDEO and see the picture is normal .
if not then.....
pls see the dvd back side
GY /BU /RV three pin
pls video out pin is plugge out and concting with step by step in all three pin
if sum picture on screen pls. canect and hold .
after that use dvd remot cantrol and selact SETUP key to on and see and open video interface menu pls set video system is select S_video.
after that reconact video pin is VIDEO_OUT and see picture is normal .