I'm new to these machines. My friend has a B Max skill stop machine that won't power up. Both 5 amp fuses are good and I have 115 vac input to the power supply. There is a 24vdc transformer in the power supply and it has a connector going to the power supply board and I don't read any voltage at the connector. Could the power supply be bad or am I missing something? The machine was working and then my friend said it stopped.