Hi We are trying to diagnose an intermittent problem with our TV. I hope this is the correct place to post. Whilst watching Sky HD our TV suddenly does what is shown in this clip..... http://uk.youtube.com/watch?v=Yi2gzWgzpkg and more recently this... http://www.youtube.com/watch?v=ckpBwS6z0EY It has only happened while watching Sky HD on the HDMI but this is possibly because that is what we watch 95% of the time. It has also happened while watching a sky+ playback. The TV is set to show a blue screen when there is no input, if we switch the blue screen option off then this problem shows as a flickering black screen. Turning the TV off and then on again clears the problem. or Turning the Sky HD off and then on clears the problem. or Switching Input channel cleared the problem. The first clip shows what happens if we bring up the TV menu and then shows what happens if we switch the Thomson HDTV box off and then on again. Originally, switching Input channels cleared the problem. The second clip shows what has happened more recently when switching Input channels (AV etc.) i.e. it seems the problem is getting worse. Which bit is faulty?? TV or HD box Both the TV and the box are only a few months old so could be repaired/replaced but we don't want to incur an engineer charge if we call out the wrong engineer. We have tried a new cable but this did not help. I have spent as much time as I can playing Xbox using the HDMI but the problem has not occured. This doesn't really help though as we can go 5 days with no problem while watching TV. although I would love to spend 5 days playing Xbox, it's not really practical Has anyone experienced anything like this at all?