Carl H Northvale , NJ March 03, 2019 Appliance: Model PS-P70B20AP-A3 Proctor silex microwave cavity light for interior lighting burnt out Simply remove the outer casing. find the cavity light . bend back the tabs holding lamp unit in place. remove unit. Remove two wires and replace two wires to new unit and reinstall bending tabs to hold in place Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes