Joystick want move foward

It might be a connection problem. I had that happem when I spilt water on it. Even after it dried it was wierd. What I did was took off the back and where the side of the joy stick is I unscrewed the screw and carefully took it out. If it dosnt move there are clasps that should hold it in pop them gently back. You should see the cable that connects into the main system. You have to be gentle and unplug it and reply it. Taking it out is easy putting it in requires a bit of patience and gentle hands. Try to see if that worked before you close it up.