One of my DirecTivos, SD-DVR 80, seems to have stopped working-kind of. Worked find yesterday. When I got up today, all that appears to be working is the fan. No lights on the front are lit, no a/v out. I even unplugged it from the surge protector for 1 minute, and plugged it back in, and nothing. The other 2 DirecTivos connected to the surge protector are working just fine, so it isn't the surge protector. Basically, the only thing working on it is the fan. Is the receiver basically fried?