I've been searching and searching and haven't heard anyone complain of this. One day (about two years ago) I started my Focus and my stock head unit (the Blaupunkt version) started cycling on and off nonstop, even when I removed the key from the ignition. All I could do was remove the fuse. I figured that the unit was bad (the screen had already almost stopped working completely) and thought nothing of it. I haven't replaced it yet because I've been broke. However I've been having a lot of lights blow out recently and just had to replace the battery after two years. Connected perhaps?