That happened to mine about 10 years ago. There was a fellow up in Maine who used to work for Olymus repair. I sent my camera to him--twice. Both times it came back with the shutter lockup problem you describe. He and gave up. He said he "demagnitized it" and cleaned it, whatever. I took the batteries out, tossed it in a box. I found the box a few years later, put new batteries in and it works fine. Still does. BUT, now both of my flashes, A11 and A16 have died! Any idea how to repair those?