Tom S Grain Valley , MO February 05, 2017 Appliance: Model SMH9787W Se error code After Google searches to find the error, I ended here. I ordered the AP5315311 (DE94-02001B) Control Panel Assembly. With the instructions by Matt M. I as able to install the control panel with no problem. It's been a few days, and the microwave is performing as a new unit. Very satisfied with this fix, saved me from purchasing a new microwave. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes