We had the same issue, which happened just before we got to the dealership for another issue (check engine light). They "diagnosed" that the radio displayed had failed and would have to be replaced, to the tune of $650. We said no and went home, then started digging, and found the fuse was blown. A stupid little 7.5A fuse, how'd they miss it. I'll not go back to them for anything. Makes me wonder about their diagnosis for the check engine light (a failing exhaust particulate sensor).