04-10-2021, 01:44 AM
Problem with the coin comparator/optics. Error 21 extra coin in not out, so not hopper. You would get the same error if you removed the CC/optics and turn the power on. Should be a problem with the optics, or wiring. Maybe coincidental with the battery change, should not be related to the battery change. Plus I think I have cleared that error by turning the jackpot reset key and opening and closing the door a couple times?
Tony
Tony