Bought a used 2007 Limited Expy the other day, but it didnt come with a nav disc. At this time the stereo worked great. Picked up a disc and installed it, but it didn't make it through the installation process. It gave me an installation error. Now it's stuck in this mode telling me to insert the installation disc. I cant get the it off this screen. I've tried disconnecting the battery, fuses, and nothing. I really don't care about the Nav portion, I'm more concerned with getting the system working again so I don't have to listen to my wife telling me repeatedly that I broke it. Thank you for your assistance.