I just bought a Yashica TL-Electro at a flea market for $10. Before buying it I tested it to see if the shutter would work, but stupid me did not test it on all speeds. It works great from speed 1/60 to 1/1000. At 1/30 the mirror and shutter stick open. I can turn the dail back to 1/60 and the mirror will fall/ shutter closes. Anyone know how to fix this problem? 10 bucks is not a big loss but would really like to use this camera.