My Avic D3 navigation was working fine until my car ran out of power from a light being on. The nav worked a few times after and now it's just saying the DVD-ROM doesn't work. I can't even get to the navi menu anymore, it just says "Insert proper disk". Need help.. thanks

I am also having same problems, unit was unplugged from harness so I can figure out day/night display, which I was successful with, now cant get into Navi Menu to customize setting. When Navi Menu is pressed all I get is a message to "insert proper disc". Problem the unit was already installed in my 08 corvette Z06, no disc included.....HELP please.