I have a Dell XPS L702X and want to play videos and some downloads from it in my Bravia sony LX703TV. I connected it through the HDMI out to TV HDMI input. The PC screen appeared but blanks of after few seconds and then appears again. This also happens when a video is played and one is not able to watch on TV. I had used the duplicate option in the display settings. The nvdia driver also recognised the Sony TV. Can anyone advise any other steps to be taken ? Thanks