I have an Upconverting DVD player. 480i.480p,720p,1080i. I can select which upconvert to use, or none= 480i. I selected 1080i. According to my HDTV display the movies are in 1080i. But I started having "black outs" on the screen, a blank screen, the audio would still be playing. Troubleshooting: I went thru several discs and this wasn't the root cause. Doesn't appear to be the HDTV either. (Although chance its the HDMI only input) So before taking this DVD player back, I have a few days left, I reduced the DVD player selection to leave the player at 480 and everything is fine, the random black outs stopped? Its a Samsung HtX40 amp/DVD player..retail 4350, actual price $200ish. Can anyone tell me how this upconvert works and what might possibly cause the picture to go blank?