04 ACURA TL: Disc Reading Error?

I have an '04 Acura TL. My navigation system has been working just fine but one day suddenly stopped reading my navi disc I have. It is all stock. I don't know what the problem can be and don't want to pay $95 at the dealer just for a diagnostic. Has anybody ever resolved this problem? Is so, please help. show more I have an '04 Acura TL. My navigation system has been working just fine but one day suddenly stopped reading my navi disc I have. It is all stock. I don't know what the problem can be and don't want to pay $95 at the dealer just for a diagnostic.

Has anybody ever resolved this problem? Is so, please help.

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