the friend who helped me out with the Speak Easy schematics also gave me the schematics to Playmatic Fiesta --- see the JPG --- "encircled blue" the text is "Replay Button". The schematics is much like the schematics to Speak Easy (JPG in post-11). In the JPG here I "encircled brown": The Replay-Counter (subtract replay) is activated EITHER by the pulling C-Relay OR THEN by the pulling P-Relay. And a switch on I-Relay EITHER activates the C-Relay OR THEN the P-Relay.
And we look it up in the JPG in post-11 --- same situation --- I guess: No good in Your pin is the Make-and-Brake-Switch on I-Relay*** and the wiring towards the "Coil on C-Relay".
I-Relay***: Look what the I-Relay is doing in Your pin - does it change "non-pulling to pulling" or maybe "pulling to non-pulling" when You (manually) start for first player --- I-Relay BEFORE manually activating the C-Relay - and I-Relay AFTER the manually activating the C-Relay - does the I-Relay moves and stays moved ?
(((If we do not find the cause of the problem: A Jumper-Wire to feed electricity to the "Coil on C-Relay" - and a push-button-switch to close is mounted in the Jumper-Wire - and the push-button-switch is mounted behind the "Coin-Return-Push-Button on the Coin-Door" - and when You want to start a new game: You press the "Coin-Return-Push-Button")))
Please check the color of the wire on the middle blade on "Make-and-Brake-Switch on I-Relay" - question: Same color as one of the wires on Your Credit-Start-Button on Your pin ? Try to follow the wires - wires starting on the Credit-Start-Button - where do You get to ?0Fiesta-Work-01 (resized).jpg