I have a Bally Alpha video American Original, after a clear and setting up for Mars Bill Validator I can't get it to accept any bill. With the door open the bill head has a green LED flashing once every 3 seconds, the bill bezel on the outside of the machine is not lit and if I turn the jackpot key I get the BillVal Comm Error. I know these MEI validatora can be finicky & I dont have an extra slide in card that the bill validator slides into. The model number on the sticker on the front of the validator shows sc6612U if that matters. I do have 3 other MEI heads with the following model numbers in them if they may work better:
sc6607 (RS232)
sc6607NE (RS232)
sc6602U (USB)
Will any of the others I have be a better match perhaps? Thanks in advance, I'm really trying to get this machine working for a family get together today