My accusync pv46 doesn't power up correctly. The back light comes on and then all I get is flashing boxes and lines all over the screen. I recycled the ppower a few times and then it powered up and worked correctly. I shut it off and tried to turn it back on it went back to acting up again. When the screen is falshing none of the buttons on the side seem to work. What could be the problem? It seems like it is a software issue. Is there a reset button anywhere?