Recycled From Facebook: Dave

My computer doesn't like Dave. Not any actual living acquaintance named Dave, Dave the TV channel. How do I know? Well, a while back I had a problem where my computer (probably because the monitor was exhibiting a known Dell fault) would randomly shut down with a message saying "Digital Input Detected: Entering Power Save Mode"? Well that fault went away, but now it's back... but only when I try to use the "watch again" function on Dave. I can use the BBC iPlayer without problems and I can use the ITV player but Dave on Demand shuts down randomly between five and thirty minutes into anything I try to watch. Anybody got any ideas why this should be? I suspect my computer just doesn't care for comedy repeats.