So at lunch I go out in car and everything fine, listen to Cowherd on Sirius on my phone. When I get off work at 5 and get in car to drive home the car will make no sound. Nothing. I put on radio, slacker, phone, tunein they all were playing but no sound. I adjusted volume up and down still nothing. Even the blinkers made no sound when I put them on. So about halfway home after fiddling with everything I could think of I just held down both scroll wheels until screen went blank. After about 30 seconds I pushed one scroll wheel back in and the screen came back on on viola, I had sound. Boy I was releived but still have no idea what happened. Has this ever happened to anyone else?