Richard L P Louisville , KY February 08, 2016 Appliance: General Electric Free Standing Microwave SCA1000DWW03 Ge Microwave Sca1000dww03: The buttons on the advantium 120 were not working all the time. How to replace Key Pcb Ass'y. Replaced the PBC Board and it works like a charm now. Shane with the chat line emailed the service manual which was a tremendous help. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes