Hi, I just got an Olympus OM-4 (+ Zuiko 1.8). I got myself brand new batteries, and took some test shots. Then I attached a flash, and tried to shoot. Suddenly the mirror locked up, and the curtain doesn't look good either. I set the camera to B and switched between Auto and Manual (as adviced in previous threads), but nothing happens. It seems to be totally destroyed for some reason. Doing the Battery check, just a very short sound appears, and the LED doesn't switch on. But the batteries are brand new.