Keith S Naperville , IL October 10, 2015 Appliance: Samsung Microwave SMH9187ST/XAA Samsung Microwave Smh9187st/Xaa / : Se error code. How to replace Microwave Touch Control Membrane Switch. I removed the front control pane, removed all wire harnesses from the PCB and removed the membrane switch. I recommend using a hair dryer to help remove old keypad membrane. Helps it come off clean with no residue. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes