Thanks much to all - I had to do the system reset twice but you are right, it did bring the audio system back to life.Infotainment system reboot has corrected this situation for me the handful of times I’ve encountered it. Even simpler than fuses.
Another thing I learned is that I need to stop thinking analog. On my audio rack at home, when things don't light up or make sound it means no power. When my iPhone makes no sound it needs reset. The P2 is just a big cell phone with wheels and seats. Now I have to fight to get the fuse cover back on.