I have an old tv that I would like to hook up to a dvd player. I bought a new dvd player and an a/v adapter seeing as how the tv only has a coaxial connecter. When I hook it up, I can hear the dvd playing but I also have some strange feedback sound. I have changed out the dvd player to see if that is the problem- same thing. I have tried different cables- same thing. Yes- the cables go to the right places seeing as how I have had many different people checking it out. No one seems to know what the problem is. Please help...