Robert P Milford , MI September 19, 2014 Appliance: General Electric Free Standing Microwave JVM1440BH01 Ge Microwave Jvm1440bh01: Burned out light bulb. How to replace Button - Lock. Replaced light bulb. It was behind the louver on the top and not reached from inside the oven. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes