Is the DVD player set to check for the best resolution automatically, or did you manually set it to output at the highest resolution?
I bought a Samsung LCD just a couple of days ago. I also updated the TV with the latest firmware. I then bought a new DVD player which I connected to the TV via HDMI. The DVD upscales and sends out 1080p. The first day everything was fine but now the screen just goes blank for like 3 seconds and then it comes back. The sound is fine and continuous but there is no picture for 3 seconds! What should I do??