My Pioneer AVH201EX double din turned off

My avh 201ex double din suddenly turned off once going to work like a 3 weeks ago. And this morning in the a.m. it turned on when i moved my car, but in the afternoon i checked again and screen was black again. I had already opened up the console and check for burnt fuses and loose wiring but everything seemed to be intact. I thought the stereo didnt work anymore but since it turned on this morning, im guessing it still does. What can it be??? Any help would be appreciated. Thanks!!