Microwave shows E7 and stops; turntable may not rotate and heating stops abruptly.

Safety: Unplug the microwave before inspecting the turntable drive from underneath.

Basic checks:

• 1. Remove glass tray: Take out the glass turntable and roller ring. Check for food debris, broken glass, or warped plastic that could jam rotation.
• 2. Inspect coupler: Examine the plastic turntable coupler that fits over the motor shaft. If it is cracked or stripped, it may not engage the tray properly.
• 3. Manual rotation: With the tray removed, gently turn the coupler by hand. It should rotate smoothly. If it is stiff or seized, the motor may be failing.

Advanced checks:

• Access the underside of the cavity by removing the bottom cover (after unplugging).
• Test the turntable motor for continuity with a multimeter. Replace if open or shorted.
• Inspect wiring to the motor and any rotation sensor (on some Tower models) for damage or loose connections.

Note: Do not operate the microwave with the bottom cover removed. Always reassemble fully before testing.