I had the Mk 1 Denon 2800. It was doing some funny things, including showing a trembling white line at the bottom of the screen start of some DVDs,. I had it changed for the Mk 2 and after having watched a few DVDs without a problem this white line has just re-emerged on The Way Of The Gun. Any thoughts? Anything to do with my Panasonic plasma 42", or... I don't know what.