SMEG No Power / Dead Appliance

Microwave display is blank and unit appears completely dead; no lights or response.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Blown internal mains fuse, Faulty mains filter board, Defective power supply on control PCB, Loose mains connection inside terminal block

How to Fix / Troubleshooting

Safety: Unplug the microwave before any inspection. Internal fuses are not user-serviceable in most regions due to safety regulations.

User checks:

  • Confirm that the wall outlet has power by testing with another appliance.
  • Inspect the power cord and plug for damage.
  • Check if there is an accessible external fuse or resettable breaker on the installation (for built-in models).

If the outlet is good and the unit remains dead:

  • An internal fuse or power supply component has likely failed.
  • Do not attempt to replace internal fuses yourself; incorrect replacement can defeat safety protections.

Contact a qualified technician to inspect and repair the internal power circuit.

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Repair Difficulty

Hard 4/5

Required Part

Internal Mains Fuse
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