Mitchell A Campbell , CA September 01, 2015 Appliance: Samsung Microwave SMH9187ST/XAA Samsung Microwave Smh9187st/Xaa / : Se error code. How to replace Microwave Control Panel Assembly. Ordered a new Assembly Control Panel containing a new touchpad, attached the old circuit board to it, reconnected everything and the microwave was working again! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes