Teresa V Pembina , ND January 13, 2018 Appliance: Samsung Microwave SMH9187ST/XAA Samsung Microwave Smh9187st/Xaa / : Samsung microwave had the se error indicating a defective membrane keypad. How to replace Microwave Control Panel Assembly. We ordered the new control panel frame assembly, which includes a new keypad. My husband replaced the part in 10 minutes and it works perfectly! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes