I have had my 500 for 5 months and not had any real problems with my media player until today! I have the up graded stereo system (interscope). The media player was working well with my usb stick until I parked the car today and when I restarted it the media player has no sound, the track names are coming up on the dial but no noise:bang:. The CD player and tuner are all fine and playing like normal. I have tried different sticks and none appear to be working. Any ideas anyone?