David J Wilmington , NC August 27, 2015 Appliance: Samsung Microwave SMH9187ST/XAA Samsung Microwave Smh9187st/Xaa / : Samsung microwave se code. How to replace Microwave Control Panel Assembly. After doing research, everything pointed to the Assy Control Panel. Although I was skeptical that it was the problem and not the actual circuit card. I ordered the Control panel. Microwave works great now. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes