Stuck Door Mechanism

[oldguy64malibu]

Does anybody have a magic way of getting a door mechanism to open short of using a jaws of life. It is a 64 malibu convertible, passenger side door.
I have removed the door panel so that I can look inside and see the mechanism but I can't see inside of the mechanism to tell if something is broken. And if it is broken how do I remove it since I can't get the door open.
Am I destined to have a one door malibu ?
Thanks in advance.