First post here! Thanks in advance for any help you can give. My dad has a Williams “Little Chief” pinball and the knocker doesn’t work when winning a free game or matching. When the coin door is open and you drop a coin through, the knocker knocks, and a credit is given. When you close the door, however, the coin is rejected and drops right through, which baffles me to no end! The game is set for free play and the button advances the number of players without coins. Not sure how to change it back to “pay to play”, but we’d definitely love to get that old familiar knock back. I’m not a pinball mechanic by any means, but capable enough to follow instructions. Thanks again!

Thank you for the help. I assume by inside the head, you mean the top with the backglass?

Thanks for the suggestions. Next time at my dad’s house, I’ll dig into it.