It looks as if you MIGHT be able to access the folding hinge mechanism without taking the mirror off the car. The mirror glass is a separate replaceable item and can be removed and reinstalled. There are some tricks to getting it out and reinstalling the glass, so if you can lay your hands on a FSM it would be useful. The FSM doesn't seem to address how to deal with a loose hinge, but their picture of the glass removal shows what looks to be a nut at the hinge location. I don't know if I can scan and post the picture tonight, but it might be online somewhere.
I didn't think of that. The mirror is held in by 4 ball & sockets. Turn the mirror full inboard and pry it loose from the outer edge. When reinstalling it, I'd cut a piece of 2x4 or plywood to lay over the outer edge so as not to put too much pressure on the g lass as you press it back in place.
Thank you all for the help. So when I pull the mirror what should come out with it on the back, so I know I didn't break anything? Does anyone have a picture of what the back should look like when pulled correctly? Any more advice on removal ?