I have searched for this topic but found nothing so I will start a new post.
I am fixing up a Getaway I bought, and have found the opto on the supercharger ramp and ALSO the opto on the supercharger itself do not activate with the fast-moving ball. They only work using my finger or slow object. I have not encountered this before. Firstly I tried replacing the transmitter and receiver of the first switch I was checking, to no avail, and then I doscovered the fault was common to both switches, and probably any other opto on the game. I wonder if the crystal on the CPU board is at fault? Anyone else had this problem, and what did you do to fix it?