My Nikon 8700 has become possessed. I can't change any settings on it because when I go into a menu the camera will constantly scroll through the menu options so fast you cannot chagne anything, or the menu will just exit. The camera also will not stop focusing non-stop. It focuses constantly to the point that you can't take any pictures with it really because they'll be out of focus.. any ideas? A video below shows what it'* doing.. Note that I'm nto even touching the camera when it'* doing that!