A CD has become stuck inside my TDK MX-30PCD CD player. The player isn't recognising that the CD is in there so it won't play and it won't eject it. I have tried removing the back cover but despite undoing all the visible screws, the back appears to need something else released before it will come off and I don't want to pull too hard for fear of breaking it. I'm not even sure if removing the back cover is the right approach. How do I get the CD out?