Seems that every time i start my car and my F900 BT boots up, the screen goes blank and i can't select anything... when i hit map/menu, nothing comes up, if i touch the screen nothing happens. the only fix i have found so far is to hit the reset button, let it load the factory settings, and when it switches back to my personal color profile (on the menu/map buttons) hit them both simultaneously... it's getting really annoying doing this because the GPS signal takes a while to home in after this, and my settings for my AV Sound/AV channels are all erased... any help please?!?