Mike, your a life saver. I had the same exact issue as the OP, radio functioned as normal, bootup screen still worked, just no image on the screen once it booted up. I was a bit nervous, until I found this thread and did exactly as you said. Took me a couple tries of turning the device on an off while hitting the menu button. Finally it gave up and took me to the main menu, and sure enough, rear camera was set to ON in the settings.(I have no rear camera). Thanks for the fix!