Flcikering

Hello, I am here today because my TV recently (as of yesterday) startet flickering as in the video here http://tinypic.com/player.php?v=20z1qv7%3E&s=8#.VL1lHS6G-_9 I have absolutely no idea why or how this has started. The TV has been hanging from the wall a year+ and has not been moved...