cwd240z

Has anyone figured out what is causing these problems? My D3 just started doing the "Insert Appropriate Disc" act tonight out of the blue. I pulled in to a gas station, turned the car off, then turned it on to leave and that message popped up. I've turned it on and off many times, and did a hard reset using the button on the face with no luck. After being frustrated for a couple hours, I went back outside to mess with it some more and it booted up like normal (with the disc still inserted) and everything seemed fine. But then the time changed to all asterisks (*) and a message popped