No sound from Radio this morning.

My wife was heading out in her Kona, and for some reason there was no sound from any of the speakers. Not Sirius, not FM radio. Nothing. She said it was working fine yesterday. I didn't see an obvious reason why this might be the case - she ultimately grabbed a small bluetooth mini-boom and went on her way.

She made several stops, and then the sound was back on again. No explanation as to what might have changed, other than having made stops and turning the car off and then on again.