I took my Pentax P3 out to take some shots since it was really nice weather out. However, after I finished a roll and was about 10 shots into my second roll, my camera stopped working. The film advance lever is limp and the shutter release isn't responding. I'm not sure what the problem is. When I press down on the shutter release, the meter works fine. However at some point, the numbers were flashing instead of a constant glow. Could it be that the batteries are dying and that's why the film advance and shutter release won't respond? Or is it something even worse like a loose element in the camera that I need to take apart and replace? Please help.