An intermittent problem is occurring on El Do City of Gold...every two or three games while playing an occasional ball the machine will start adding score for no reason. Even when holding the ball on the flipper it will add score. When the ball drains, the random scoring will stop & everything resets properly. Happens once in a while, but enough to be a bother. Any thoughts or suggestions? I looked closely at all under play field switches, they seem clean & adjusted properly. I cleaned and visually inspected the connectors too - they seem to be OK. Running the self-test doesn't indicate that anything is wrong. Other ideas on what I can try?
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