William Q Tampa , FL March 05, 2015 Appliance: General Electric Microwave HVM1540LP1CS Ge Microwave Hvm1540lp1cs: Keypad did not work and microwave will come on by itself. How to replace Assy-Control Panel. Replaced the Assy-control panel. It was extremely easy!! Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes