![MPU011A- This completely redesigned board replaces Williams System 11A & 11B MPU / Driver Boards part number D-11883-xxx (where xxx is the game number). MPU011A- This completely redesigned board replaces Williams System 11A & 11B MPU / Driver Boards part number D-11883-xxx (where xxx is the game number).](https://www.thepinballwizard.net/images/products/thumbs/pmpu-0004.jpg)
MPU011A- This completely redesigned board replaces Williams System 11A & 11B MPU / Driver Boards part number D-11883-xxx (where xxx is the game number).
![TECH: How to replace the battery holder on a Williams System 11 CPU board | Museum of the Game Forums TECH: How to replace the battery holder on a Williams System 11 CPU board | Museum of the Game Forums](http://johnsarcade.com/images/whirlwind/close_up_1.jpg)
TECH: How to replace the battery holder on a Williams System 11 CPU board | Museum of the Game Forums
![MPU Replacement Board for Williams System 9, 11, 11A, 11B und 11C | Bad Cats | Pinball Parts by Game | Shop | Pinballcenter MPU Replacement Board for Williams System 9, 11, 11A, 11B und 11C | Bad Cats | Pinball Parts by Game | Shop | Pinballcenter](https://www.pinball.center/media/image/63/d5/86/65570_1.jpg)