I have a mint canon QL17 giii that I went throught the trouble of replacing the seals on. I was running my first roll of film through it when the shutter just stopped at 24. After i rewound the film and closed the back the film advance would work, taking me to frame 1. But the shutter still refuses to fire. I tried replacing the battery to see if it would make a difference but no. Is there anything I should try to get it going again or should I just get another one?