Boris L Bronx , NY August 27, 2016 Appliance: Model MICRO CHEF MCM990ST LIGHT BULB Replace light bulb in microwave magic chef mcm990st Remove five screws from back of cover. Move cover back and take it of. Disconnect two wires from bulb using small flat screwdriver. Carefully unbent two holders with pliers. Remove old bulb and replace it with new one. Connect wires. Put cover on place and move it forward. Tighten five screws. Read More... 7 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes Tools: Pliers, Screwdrivers, Wrench Set