I just bought a Pentax ME Super from ebay and I'm having a little trouble with it. When I first got it everything seemed fine with it. I could look through the view finder but the batteries were dead so there wasn't any LED's lit up. It didn't have any film in it but I wanted to test it so I advanced the crank and pressed down the shutter but after I did that the shutter stayed closed (I can no longer see through the viewfinder) and the crank wont advance. Is there anything I can do to fix this?