After a central locking fault that has ended with the latch becoming seized on the passenger door, I have removed the door card and can access the plastic cover to the latch, I have managed to remove the cover to reveal a plastic white box with a lid, can also manipulate the levers on the latch with my hand but they do not do anything. What is the easiest way to remove the door, should I just unbolt the door hinges or drop the pins since the latch seems like a lost cause without destroying it completley?