i have an '06 with the Bose / Nav system. Lately, my Nav system gives me either a "disc error" or "disc not found" error. I've tried cleaning it and reinserting it several times but to no avail. Once last weekend I just put the disc in and it worked! It weorked to my destination 90 miles away,it allowed programming the return trip ok but I stopped shortly after starting the return to get a bite to eat. Upon powering up to leave, the screen turned multi-color and never recovered. removing and reinserting the disc brought me back to the same errors as before. does anyone know if it is the disc or the player? I hate to buy a new disc at $200 only to find the real problem being the player. Is there anyone out there that makes repairs?

Any suggestions will be appreciated.