When you say you get no sound from TV, does it mean that you have your player connected to tv only or do you connect it to the hi-fi and to tv at the same time?
What kind of connections are you using for the purpose, both to tv and to hi-fi?
If you connect the player only to tv via s-video cable, do you get that kind of almost no sound?
And about scart plug (if you use it)?
If you use component connections do you plug all 3?
Are the connections ok? And does it work with other discs?