Roger W Cincinnati , OH November 16, 2015 Appliance: Samsung Microwave SMH9187ST/XAA Samsung Microwave Smh9187st/Xaa / : Microwave was giving a 5e or se error keypad would not work. How to replace Microwave Switch Membrane. I ordered a new keypad membrane. I disassembled the keypad assembly, and replaced the membrane with the new one. It was a perfect match, and microwave is now in great working order! Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes