![MPUSEC- This board is a plug and play replacement for the original Bally / Williams WPC-S Security MPU processor board. The original MPU board that this board replaces is Bally / Williams MPUSEC- This board is a plug and play replacement for the original Bally / Williams WPC-S Security MPU processor board. The original MPU board that this board replaces is Bally / Williams](https://www.thepinballwizard.net/images/products/preview/pmpu-0007.jpg)
MPUSEC- This board is a plug and play replacement for the original Bally / Williams WPC-S Security MPU processor board. The original MPU board that this board replaces is Bally / Williams
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Williams WPC / Sys11 - Pinball RAM Extraction, and Socket / NVram Installation Without an Electric Desoldering Vacuum : 6 Steps - Instructables
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