Donna L Erlanger , KY June 28, 2014 Appliance: General Electric Free Standing Microwave SCA1000HBB04 Ge Microwave Sca1000hbb04: Turntable would not rotate. How to replace Shaft Assembly (Shaft Assy). Installed new shaft assembly. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes