I've just bought a new Samsung TV and the TV speaker is out of sync. with the external speaker output.It does not make a difference if I feed sound from the Sky box to my amp or use the audio output on the back of the TV, either way I get an echo. If I turn the TV speaker off, the sound from my amp is out of sync. with the picture on the TV. I have never had this problem with previous TV's. Any ideas anyone?