OK I've been digging a bit deeper and found this so far. There is a circuit board with a rotating wheel. (first pic) It seems to sense how much has been payed out and tells the hopper to reset. There is a solenoid on the underside of the hopper (second Pic) that seems as though it would pull in to reset the wheel, but it doesn't pull in at all. Initially, it would reset if I removed the hopper from the machine and put it back in. Now it doesn't reset at all. If I push the lever manually it will pay out once and then not reset? If anyone can tell me where the wiring goes from the solenoid or what component sends power to the solenoid it would be a big help in troubleshooting, also, if anyone can tell me what voltage the solenoid operates on so I can test it that would be great. Again, thanks in advance. I seem to remember that sometimes when I would replace the hopper, the wheel would spin back to its reset position. Not sure where it got the signal to do that?