Hey guys the other morning I made a couple of stops and after one stop when I got back in the truck and started it up I had no Nav. or radio. Just a black screen and it wasn't working. It wouldn't turn on so I checked the fuses for the amp/radio and misc ign. I also cycled the door locks and set the alarm and disarmed it stilll no radio/nav. After I checked the fuses I got back in the truck it was working (it went into self healing mode). I thought the screen flashed once during the day but, I couldn't be sure, I was going from under a ramp into the sun with sunglasses on so I think it was just my eyes. It's been working ever since. Any thoughts? Thanks. Eric.