sounds like you don't have any power going to the coinmech from the jones plug, check the female jones socket at pins #1 & 2 with an A.C. voltage meter rated to test at least 120Volts A.C. or a simple neon light tester will work in a pinch. as I said, you should have 120 volts between Pins 1 & 2 of the female "Jones" socket on he machine. if not, then there may be an open wire or sometimes on later machines there was a small push-button type of circuit breaker that would have protected the coinmech in the event of a short circuit. if so, then all you need do is to push the red or black button back in with the machine unplugged.
there is also a possibility that you have not one, but two bad coinmechs.
or the machine simply doesn't like you.