I have a canon AT-1 that I took on vacation; unfortunately I dropped it and the battery popped out and got lost in the snow. When I got home I got a new battery for it but now the meter does not work. It's as if the needle in the viewfinder is disconnected, because the 'battery check' function does not work either, although all the shutter speeds seem to work. I know it's a long shot, but I thought maybe there was a very common failure mode for these that could be fixed easily. It's worth a try. Maybe I'll try dropping it again.