Bob V Troy , OH July 05, 2025 Appliance: General Electric Dishwasher GDF520PGJ5BB Ge Dishwasher Gdf520pgj5bb: No operation cb cycled no hard reset no lights. How to replace Service Machine Control. Replaced the control board. So far it seems to work. The most difficulty is ensuring 2 harnesses are in the protective slots while fitting the cb in the cavity. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes