Hooked up my new AVM20. Worked perfectly for about 2 days -- just long enough to realize its a great piece. Then, whammo, it doesn't work. When you hit the power, no power LED's light up, the screen stays dark but the word "Anthem" appears in very dim grey letters. No buttons work except mode which says (in dim letters) no stereo source found. No sound through speakers. Nothing changed between the time it worked fine and the time it didn't -- hook up was the same. No apparent power fluctuations, etc. Anybody have any ideas other than unplugging it for a while (did it to no effect)? My dealer is being great but there are no new units in stock and I want mine to work while I'm waiting for a new one.