Rafael B Apopka , FL November 12, 2016 Appliance: Frigidaire Microwave PLMV169DCE Frigidaire Microwave Plmv169dce: None of the buttons on the keypad worked; the display however was still working. How to replace Membrane-Switch. Replacing the control board fix the problem which seamed to be the keypad at first. Keypad was not the problem. Install was really easy. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes