Changer will only recognize the left hopper. Put the board, P/S, hopper, and billhead in another cabinent and it works fine. Put same parts from a known working changer into this cabinent get the same trouble.....machine err code (usually) then only see's left hopper. Have ohm'ed out all wires and they all seem to be ok. So, does anyone know causes the changer to only see one hopper? Also, the MCC payout option in the programming becomes unavailible and only shows the left hopper...help.