It seems like there might be an issue with the power supply or control board in your Royal Professional grinder. To diagnose the problem, you can try a few things. First, check if there's power reaching the grinder by testing the outlet. If the outlet is working, but the grinder still has no power, it might be a control board issue. You can also inspect the wiring for any visible damage. If you're unsure, it's best to consult a professional technician to determine if you need to replace the control board, power board, or both.