alright, i get into my car today from autozone and i noticed that my navigation screen was blank!!!!! i pressed all the buttons and nothing... the only thing that worked was my Audio button... the screen popped up and it showed all of the usual information. what could be the issue? any help would be great. thanks in advance

 

broken dvd unit? take it to alpine for a $158 repair.

 

hmmm not sure... hell for that i could source one from a high end junk yard lol.
broken dvd unit as in the whole thing is F***** or just the disc