I have a 2011 Journey. All of a sudden the audio in my vehicle does not work (for radio (sirius and fm/am), nav system, dvd player, and bluetooth). I have tried volume buttons on steering wheel and panel and they display on screen as if they are adjusting the volume, but still no sound. I have also looked at audio settings and they appear to be fine. I have an appt next week at dealer, but wondered if there is some simple solution I am overlooking? Thanks in advance for any information you can provide!