Rancho plays a complete game with no problems. When I start a new game the game jumps from one player to two players (it's a two player game), the score reels reset to zero, and then it just keeps running-here's what's happening at that time...
-coin relay pulses
-latch on the second coin relay pulses
-the solenoid that resets the drop target relay bank pulses
-score motor continues to run

If I cycle the main on off switch, this all continues, but if I turn the game off and walk away for even like 5 minutes, when I turn it back on, the score motor runs and the game is ready to play.
I have cleaned score reels and every relay and switch I can and this continues. This is a new problem as previously the game played fine. Any advice or ideas would be welcome. Thanks in advance.

I thought the same thing, amongst many others, but I disconnected the coin door and the problem still exists.

Thanks to all for the advice. There is a switch on the top of the credit stepper that wasn't making contact-little cleaning, slight readjustment and good to go-special thanks to pinballdaveh for leading me in the right direction.