I did a couple dives and everything was fine. Then on the next dive I took one photo and then after that I could not get the camera to focus. I had a strong focus light and so lighting wasn't the issue. I had a fresh battery in and used the same memory card from the other dives. The card only had 10% used on it. It looked like the zoom bar on the side of the screen was illuminated even though I hadn't hit it. Is there any kind of reset for the camera? Should I reinstall the firmware? I was not happy since I was at a new dive site and saw some very cool stuff. Has this happened to you?