Unplug the Frigidaire FMV157GC microwave from the wall outlet before beginning the repair. The power cord is often in the cabinet above the microwave.
Open the microwave door and remove the plastic trim ring inside the microwave door. To remove, gently insert a flat screwdriver behind the ring and pry it off the door. Use extreme care when removing the trim ring to avoid cracking it.
Tighten the door handle screws, if the door handle is loose.
Remove the door handle screws and remove the door handle if the handle is broken.
Align the new door handle with the screw holes and install the door handle screws to secure it to the door.
Align the trim ring and press firmly to snap it back onto the door.
Close the microwave door and restore the microwave's power supply.