Hi folks, Signed back up to BT TV a few weeks ago. I've been having problems when playing recorded programs or watching on demand. I get a black screen with no sound part way through the program. No menus work either. I have turn the box off and on again to restore service, sometimes just once, other times every couple of minutes. Last night I had so switch off at the mains to stop it crashing. Any idea what could be causing this before I phone up?