With a  fix like this.. and boy - this is a mutha of a fix!

I have to marvel at the designers and engineers of these games.. here we are some 40 years later with chip technology etc... what you have in your game is chip technology also, but each relay is a logic gate... its chips broken down into its purest form.. and yet its repair still eludes us.

I cant begin to imagine just how clever the engineers were who designed these machines.. and in prototype stage, fault finding must have been a nightmare