Gottlieb Arena System 80B MPU DeHack and Test

Chris Hibler documents a repair of a Gottlieb Arena System 80B MPU board that a client had previously sent to a generalized board tech, who had removed the U2/U3 daughter card, bodged in machine-pin sockets, and coated traces with a hardening adhesive. Hibler uses a continuity-raking technique to locate solder bridges and trace damage, restores the board, installs a Pinitech NVRAM and free-play PROM, and walks through the Arena test modes. The video is a detailed bench-repair walkthrough with no new machine or industry announcements.