Can anybody recommend someone in the Plymouth, Ann Arbor, Michigan area to repair snack machines and be able to work on cold drink machines? Ken

Bought out another vending business. He had this GPL 159 reman in storage with no bill validator or coin mech. The coin mech is a 15 pin 9302lf 24 volt and the bill validator is a ba30sa. I have tried 2 of these validator in this machine that worked in other machines but they won't work in this one. The light in the logic board light once and the validator cycles when the power is turned on but then the light goes and it will not even try to pull a bill in. I have a ba32sa 24 volt that will plug into the same plug but I'm afraid it might burn it up. I plugged a 12 pin 9300 into it and it will accept coin but validator cycles when power applied and goes back out again. Sorry for so long but sure could use some help if someone knows whats wrong here. Ken