Heres my issue i have a stern flight 2000 that ran flawlessly using a ultimate mpu. I bought a stern meteor that had a bad mpu so after cleaning up the machine and ordering a new alltek mpu i decided to pull my alltek from the f2k and clear it put it in the meteor and when the new one got in install it in my f2k didnt want to wait to try out my new game . Meteor booted up and started a game flawlessly. The brand new alltek came in a couple days later so i set it up put it in the f2k boot it up and all seemed fine voltages spot on proper boot goes to attract ect and all but will not add credits to start a game displays show high scores and cycle correctly and 0 20 is shown in the credit match display Everything is brand new in the f2k boards wiring coin mechcs ect. I have tried performing a memory clear 3 times and resetting game selection and dip switches properly just to be sure i didnt miss a switch some how but still wont credit up any ideas?