I have all of the screens working, FireTV is operating in the rear seats through the vehicle Hot Spot. The front passenger screen comes on and I can choose the two lower, of the three options on the left side. One for screen brightness and headsets and one for notifications. When I push on the home button, the screen stays powered on, but it is blank. Nothing to see, or options to choose, sliding up/down/right/left produces nothing but the same blank black screen.