pearl93'ls

I bought this car at auction a few months ago ($5900 with 138k) and it has been awesome! What a major upgrade from my 2006 es. It is pretty well equiped with the Lexus Enform Nav and radio. I have had no issues with the car until a roadtrip from Chattanooga (home) to Gulf Shores, AL. This was my longest road trip in the car. On my way home yesterday the audio on the radio became intermittent. But usually a restart of all systems including the car would bring it back to life. Today it is gone all together...nothing.. Everything powers up and you can change the stations but noooo audio. wth? Any info or tips you guys can provide would be so appreciated. Thanks Joe