Mine simply cracked where I drew the red line. The fuse cover actually uses a phillips screwdriver rather than just a twist of the fingers so, I suppose if one tightened it too much, it could force the back to crack. Again keep in mind the projector bounced around the back of a van for 550 miles with no flight case. It just got thrown back there after the Newton show. A piece of truss or anything could have knocked against it.