My Sky + box has started having problems recording movies. Oddly, it appears to only happen with movie channels (the free ones - I don't usually pay per view) which are recorded via the timer. The problem does not manifest itself if I switch on the TV to the movie channel it's on and press the record button. The problems comprise some video drop outs but the worst one is audio drop outs and loud low frequency buzzing noises obliterating the sound track. My box is out of warranty, so calling out an engineer will be expensive and rather than do that I would upgrade my fairly elderly box.