I have had this lcd flat panel for about 2 1/2 years, purchased new. About a week ago, the panel would not display any video. I fiddled with it for about 30 minutes, unplugged cables, unplugged the power to my directv box and the panel, and got it working. Now its doing the same thing only i cant get the display to work. When I turn it on, I get a blue screen for 1-3 secs then the screen goes dark. Sound works ok. Is this unit dead? Suggestions?