Thomas A Monongahela , PA January 12, 2015 Appliance: Samsung Microwave SMH9187W/XAA Samsung Microwave Smh9187w/Xaa / : Microwave not turning on se code. How to replace Microwave Door Latch And Switch Assembly. Changed control panel assembly and latch body assembly. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes