Need help/advice with dead Nav

I have a 2007 CX7 with the navigation tech package. A couple of weeks ago I ordered the latest map dvd. It installed fine and I had no problems with it until today. While driving I noticed the screen went black. Then it started the Software update process with the progress bar. (This is what it originally did when I first inserted the new DVD). Then it restart the process and continues looping until I turned off the car. When I turned on the car it displayed a message Please insert the correct map disk.

I then disconnected the negative battery cable and waited a bit. When I reconnected and started the car, it went through the setup again. This time though, the progress bar wouldn't complete before it went into the look. Eventually as I was driving to the dealership, the screen just flickered and now it's just black.

Has anyone experienced this or heard of it before? I'm not sure what to do now.

Thanks.
 

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