I have a Mitsubishi vs-5043 projection screen TV. I won it used in a raffle so I don't have any of the manuals for it. For the past two years or so sometimes when I turn it on the screen is black, I can still hear the audio but the video is not there sometimes I could let it sit for 10 minutes and nothing happens other times the video comes up in a couple minutes, sometimes turning it off and on helps but not always. Today After it was on for about 2 hours the screen went black for about 10 minutes then reappeared. Anyone have an idea on what might be causing this?