My nav screen started closing only half way when I turn the car off. If I press the open/close button it will open and close the whole way (even with aux power). Just won't work when I turn off the car. I'm pretty confident it's not the slider switch that regulates if the screen is open or closed. It seems like it goes half way then gives up closing.. almost like it lost power. I also checked to make sure it has clearance in the back... it does. Any ideas on what it could be. FYI: it was closing all the way at some point.. it just stopped working.