Subject: Metallica L/E and Premium machines. New firmware for the magnet processor board along with software version V1.22 or higher optimizes the hammer/magnet feature.
Symptoms: False hammer strikes. Or the magnet will grab and hold the ball for a brief moment and release it without the hammer and disappearing ball mechanism activating.
Solution: Contact your distributor for a replacement magnet processor board # 520-6801-00. Please note. Games manufactured with serial number # 242584 or higher will have the new magnet processor board.