A couple of weeks ago there was a sync problem on Prime terrestrial HD using a UHF antenna. Prime ultimately acknowledged in an email to Freeview that there was a problem being experienced on selective sets manufactured by e.g Samsumng and others - mainly in the Wgtn area. This info was confirmed and passed on to me last week in a follow telephone call from Freeview. Unfortunatly, today the syc problem has surfaced again. The Prime picture is running about 4 to 5 secs ahead of the audio reception. So, viewers don't do what I did and rush out with your set to the repair shop. It is a Prime transmission issue.