Walter F Mccomb , MS May 09, 2015 Appliance: Tappan Tappan/Microwave TMV151FSA Never saw an error code but only a few of the keys wouldn't work Took the keypad panel off and disconnected the wire hanesesses from the control board. Peeled off the old keypad and stuck the new in its place. Revonnected the control board and wire harnesses. Took a picture of them before I disconnected though just in case I forgot. Put the top vent plate back on and fired it up. Works like a new one. Read More... Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes Tools: Screwdrivers