Sorry, I may have added to the confusion, my problem was pre-tuner. My original unit used to lock up as soon as the aux in was selected. Once the power was cycled the unit would hang when it got to 'Starting Audio', hence my interest in the post. From that point, only a new upload of firmware would actually make it work again.

I'll find my original post and get the serial log and show where the problem. Because he's having trouble with the tuner, I suspect it's the same problem.