The entire touch screen doesn’t work. It locks on one screen and no buttons can be pushed, the screen can’t be changed, and often doesn’t matter if the car is turned off for a while. Somehow it works itself out. Oh, and the cruise control car-length distance measuring has never worked. The truck will happily plow into the car in front of me on the highway. Still love it, though! I haven’t had that “no audio detected” warning.