Fran K San Jose , CA May 09, 2017 Appliance: Frigidaire Microwave FGMV173KBB Frigidaire Microwave Fgmv173kbb: Trim piece (grill) over the microwave door was broken. How to replace Screw (3Mm X 8Mm). I ordered the replacement part, removed the broken piece and replaced it with the new one. No moving parts, electrical connections, or anthing complicated, just three screws. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes