When I select 1080p output on my Apple TV, the picture and sound cutout. It used to be that I could unplug the unit and plug it back in and it would work fine for a few days. Now with the 3.0 software, it is unwatchable in 1080p. If i switch it to 720p it works fine. I did a factory reset with no effect. My receiver shows the hdmi signal is being interrupted in 1080p but is steady on 720p. Any suggestions?