Microwave is excessively noisy (rattling or vibration) during operation

Safety first: Unplug the microwave before tightening any screws or accessing internal parts.

Step-by-step checks:

• 1. Remove external items: Take off any objects placed on top of the microwave that may vibrate.
• 2. Check turntable assembly: Ensure the glass tray and roller ring are seated correctly and not chipped or warped.
• 3. Tighten cabinet screws: With the unit unplugged, tighten any loose screws on the outer cabinet and mounting brackets.
• 4. Internal inspection (for experienced users): Remove the cabinet and check that the magnetron, transformer, and fan assemblies are securely mounted. Tighten mounting bolts as needed.