I have a real basic home setup for my tv and dvd player and its' worked fine until we recently installed time-warner cable system with it's basic cable box. Now i can't get my dvd player to play thru to the tv. I know the dvd player works because you can hear the soundtrack coming thru the speakers but no picture. It would seem the picture is leeking out somewhere but i'll be darned if i can find where. The tv is connected via an RF Modulator because there is only one cable connector on the backside. I also have a stereo receiver that the dvd player is running thru. What am I doing wrong?? Help!!!