jlmanager

Hello all! I picked up a copy of Super Cobra about a month ago, popped it in and...nothing. Theres a rattling sound that wasnt there when I bought it, so Im guessing something has broken loose. I was going to open it up and see if I could fix it, but couldnt find any obvious methods of opening it up, and no real help online. Any suggestions? Its a Parker Brothers cartridge.