900D Bottom Side Door Removal

Hi, can anyone tell me how I remove the bottom side door on the right side please. My case is too big to fit on my desk, so I have it parallel to the wall with the window side facing me, recently, I was doing some work on it that necessitated turning it around so that I could access the right side. I turned it as far as I could, so that the front feet were just on the desk, and started working. I must have knocked it and it moved enough for the front feet to drop off my desk and drop the bottom of the case onto the edge of my desk, while the side door was open, As a result I can no longer close the door, it's very stiff and is considerably lower than it should be, in comparison to the magnetic catches. I'm not sure what part of it is damaged, the door, the hinge or even the bottom of the case.:eek: