Hello! I've got a Yashica Electro 35 GSN. Since a few days, I've got a problem with AUTO mode. Using 16 and 11 aperture ring the shutter doesn't close until I press the trigger button for a second time. With bigger aperture values it always works OK. I've tested it in B mode and Flash mode and it also works OK. Even, I removed the battery and the camera (works permanently at 1/500) and it's OK with all aperture ring values (even 16 and 11). Anybody knows which could be the problem? Is it possible to repair? It could be the battery? I think that it's old because is the original, from the 80's but I'm not sure that Auto mode uses the battery. I pressed the battery check button and it shows the white light on counter. Also the exposure lights (orange and red) works correctly. Thank you very much!