This camera has a safety-lock feature and you cannot open the back-cover when film is loaded. In case of trouble, it can be opened by following these steps. 1. Turn the main switch to OFF. 2. While pressing the ISO and AE-lock buttons, turn the main switch to ON. 3. This message (Back cover can be opened) will appear and the back-cover can now be opened. • If you change your mind and don’t want to open the backcover, repeat steps 1 and 2. No message will appear and you can continue to take pictures. If the back cover still won’t open, 1. Remove the screw and small panel, located below the PC terminal. 2. Place the camera in a dark (light tight) box. 3. Slide the inside lever down to open the cover.