I am trying to connect my Dell Laptop to a 50" Plasma TV so that I can show presentations to a group of people. I have tried both VGA and S-Video connections and I get a slight flicker that shows up on the TV. This 'flicker' shows up as horizontal lines throughout the display. I have changed the resolution, refresh rate, etc. and have had no luck. Can someone please point me in the right direction!? Thanks!