Ultimate MPU aftermarket replacement board (eprom v8.2) for early Bally/Stern electronic pinball machines. Shipping insurance included. Comes with manual. Can activate via dip-switches most any first generation Bally/Stern pinball. Has Free Play on Bally MPU only. No Free Play on Stern models. No battery needed. Drop in replacement. Duplicate your current dip-switch options then set the game name and free play. That's it.
Please use the "Ask a Question" button on this page for more information. Sometimes you need to replace the pins in your game wiring harness. Many other issues need to be checked, such as a blown fuse or a defective power/driver board or transformer assembly. Please read the owners manual, below.