James B Stanwood , MI June 26, 2017 Broken microwave tray and rollers. Just replaced them, BUT, NEVER turn on the microwave unless there is something in the unit to absorb the heat. Ours accidentally got turned on with nothing in it and it actually melted a hole in the glass tray and set fire to the plastic ring with the rollers. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes