Thank you all for your replies. I will get started first with checking out the compressor issue and go thru the steps Mr. Allen Watson outlined. Then onto the other machine with the acceptance of coins and bills, along with the selection pad. As a side note these machines were not my choice, my boss went ahead and bought them without researching any information about the Genesis vending machine. Once again, thank you and I do appreciate all your responses. I guess I know what I will be assigned to do this weekend.