Microwave shows E09 and stops mid-cycle; may restart and fail again.

Safety: Always unplug the microwave before inspecting the cord or internal components.

Basic checks:

• 1. Outlet and circuit: Ensure the microwave is plugged directly into a dedicated outlet. Avoid extension cords or power strips. Check that no high-draw appliances (toaster, kettle) share the same circuit.
• 2. Test outlet voltage: Use a plug-in outlet tester or multimeter to verify proper voltage and grounding. If voltage is low or fluctuating, contact an electrician.
• 3. Inspect power cord: Check the Sharp power cord for cuts, kinks, or burn marks. If damaged, it must be replaced.
• 4. Internal power supply (advanced): Unplug the unit, remove the cabinet, and inspect the control board for burnt components, bulging capacitors, or loose connectors on the low-voltage side.

Repair: Replace a damaged power cord or control board power supply section with Sharp-approved parts. Persistent E09 with normal line voltage indicates an internal power supply fault and should be serviced by a technician.