Thomas M Santa Fe , NM November 21, 2018 Appliance: General Electric Free Standing Microwave JVM1790SK01 Ge Microwave Jvm1790sk01: Turn table was not turning. How to replace Turntable Coupler. I replaced the coupler on the end of the drive shaft. It's a piece of plastic that wears out. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes