jstquilting

I just picked up an electric White Rotary machine with embossing on the machine and the machine bed. It's in kind of rough condition and is in a cabinet. When I lift it up, it won't stay up. I can't see anything that would hold it in place. It's truly beautiful, or would be if cleaned up. I've googled and googled and can't find any information on what I need to do to get it to stay up in place. Something in the lifting mechanism must be missing.