Bisley

I have an AVIC 6200NEX installed in a motorhome. On my last trip I was having a problem with losing sound that I attributed to a loose speaker connection. The sound finally stopped completely and so I figured I would check the connections when i got to my destination about 8 hours away. Everything else was working fine, just no sound. When I finally got the chance to check the connections they were all good. I'm looking for any advice that my help me solve this problem. Thanks