My avic took a fall over the winter months while it was not in use. When I recently connected it to the brick ac/dc power supply I got the blue led but nothing else. In the car, once mounted in the cradle I discovered it powered on and booted, but there was no response from the hard buttons. Today I decided to take a look inside for loose connections.
NOTE: there is a hidden screw in the battery compartment under the large black sticker the battery sits on, it's actually shown in the service manual had I paid enough attention, instead it took a while to figure out
In the process of