So i have a avic 7200nex in my jeep and i plugged my phone charger into the usb port to charge the other day, now whenever i start my car it goes to the radio and plays for a few moments then switches over to usb/ipod port even tho i have nothing plugged in it and then says its initializing then a few seconds later it says this device is not longer connected. How do i get this to stop?