System 11B MPU Battery Corrosion Repair

Christmas sure was a good time for pinball repairs! Several weeks ago, a customer advised me that their Elvira and the Party Monsters (Williams, 1989) was no longer working. They had had the game for a long time and it had always played without issue. However, they did note that sometimes it would take several flicks of the power switch for the game to turn on properly. Now, it would not turn on at all. No lights, no sounds; nothing! When they opened the backbox to inspect the game, they found a lot of green electrolyte from badly leaking batteries on the MPU board. Uh oh! This was likely the source of their problems, so they brought the MPU board in to me for repair.

Read More