I have searched and can't find much info on this, but occasionally when I shut my Jeep off (either for the night, or just to run inside a store) and get back in and start the Jeep the radio is off. It's always on the clock screen and it's usually on an AM station. Kinda like it's been reset. It's very strange, and of course my dealer said they've never heard of it. They said they may be able to just order me a new radio but I figure I'd check here first to see if anyone else has heard of it. I PM'd someone who had the issue and he said both of his Jeeps do it but it only happens 2-3 times per year. Mine is 1.5 years old and it's done it maybe 4 or 5 times.