Brian E Commerce City , CO October 27, 2020 Appliance: General Electric Microwave Hood Combo PSA9120SF1SS Dial function didn’t work on my GE advantium 120 convection/microwave Removed control panel from microwave, took pictures of the connections. Removed a circuit board(4 screws) and moved another one out of the way(2 screws). 3 screws held the Encoder board in and one small electrical harness. Take your time and it won’t be a problem. Read More... 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Screwdrivers