I made some more progress on Q*Bert in the past couple of days. First, I got the knocker working. Here’s the original knocker assembly:

The coil was dead, as well as the fuse. I put in a new coil:

I put in a new fuse, and tested the transistor that powers the knocker to make sure it was OK. It’s knocking as it should now. Gotta love those knockers.

Here’s a pic of how the control panel was:

I swapped out the joystick for one that matched better, put in new buttons, and a new overlay:

While working on this, I had to find a way to keep the cats from climbing inside the cabinet. Homer Simpson worked nicely: