Donald M Humble , TX June 29, 2020 Appliance: General Electric Microwave JVM1950SR1SS Ge Microwave Jvm1950sr1ss: GE microwave erratic operation stopping or failing to start no alarm codes. How to replace Pcb Main Asm. Replaced the Main Control Board and a sticking/slow to activate Door Micro-switch. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours