When watching a blu ray, the couple seconds of black usually starts shortly after the movie begins. I'd say in the first 5 minutes. If I pause the blu-ray (and shut the tv down) to briefly do something else, the Samsung will repeat the blackout, once again, in the first 5 minutes after replay. I haven't noticed any pattern while watching the tivo, other than it's only happened when i watch a recorded show. This second issue started within the last week.