I've just finished with the reset sequence of a Williams 4 player machine. The video is centered around my 1976 Space Mission schematic, but I assume it will also apply to similar 4 player models.

You will probably find it really boring, and it is my hope that it may help someone less familiar. It's uploaded in HD so a full screen viewing will be easier to see. Be sure to use the video's pause button in a particular area of focus if necessary. Troubleshooting tips are at the end for noobs. Some slides don't line up exactly perfect but that's the way it goes.

Thank you for the positive remarks. I believe it is all accurate, but if any errors are found along the way please let me know.

Yea, I've been aware that some of my vids are blocked from mobile devices. I haven't investigated why yet but I may need to contact youtube/google about it.