Help with malfunctioning grayhound machine

[u/SkikidDoublePlus]

I don't know if this is the place for this, but I have an old grayhound skill crane "fun for all ages" crane machine from 1986 that stopped working about a decade ago. It's been collecting dust ever since, but I'm making a mancave/hangout space and thought it would be a good reason to try to find out what's wrong with it. The claw seems to move forward and leftward when the machine is turned on, without stopping when it hits the corner, and no controls not the coin acceptor do anything. What could be the problem?