Check the listing for details. Potter AFC-50 Replacement Board 3992756 for Control Panels & Keypads Panel. Condition: For parts or not working. Listed at 199.00 USD. The Potter AFC-50 Replacement Board 3992756 is a specific part designed for control panels and keypads, specifically for the Potter brand. This board is a crucial component in ensuring the proper functioning of alarm systems and facilities. Its model number is AFC-50, providing a direct replacement for a damaged or malfunctioning part. It is essential for maintaining the security and functionality of surveillance and alarm equipment in both commercial and industrial settings. This was pulled from a unit that needed replacement. I am unsure of why it was damaged. If I had to guess it would be either that the batteries were wired backwards or that the slc and nac got crossed. Those are the most common reasons techs pop panels.