For the past 2 weeks my tv picture has been pixellating when viewing ordinary channels via my Youview box. This does not occur when I watch other TV's in my house which are not connected via a Youview box.
Also when I watch Sky Sports via the Youview box, this does not occur.
I have re-tuned the box but no different. Any ideas??
Have you tried using an alternative aerial lead as it sounds like it is picking up interference. Also try a retune without aerial plugged in ( this will clear the memory) then plug in aerial and retune again. YV button on remote > Settings > TV channels.