I am attempting to put old videos of my son on dvds - purchased an inexpensive dvd recorder to try this. I copied a tape over and both the video and sound work on all dvd players I have except the one I have hooked up to our main television. TV is a HD Mitishubi and DVD player is a Pioneer Elite. Anyone have any ideas why I get no sound? I even have an older 9" TV with dvd player combined that the dvd works in.