Panasonic No Power – Primary Power Circuit Failure

Microwave does not start at all; display is blank and no lights or sounds when door is opened or buttons are pressed.

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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 line fuse, Faulty power cord, Failed noise filter board, Defective main control PCB

How to Fix / Troubleshooting

Safety: Always unplug the microwave before inspecting the power cord or outlet.

Steps:

  • Check outlet: Plug another appliance (like a lamp) into the same outlet to verify power is present.
  • Check breaker: Inspect your home's circuit breaker or fuse panel for a tripped breaker or blown fuse.
  • Inspect power cord: Look for visible damage, cuts, or burn marks on the cord. If damaged, do not use the microwave.
  • Try another outlet: If possible, plug the microwave into a different, properly grounded outlet.

If still dead: The internal fuse, noise filter board, or control PCB may be faulty. These require opening the cabinet and should be serviced by a qualified technician.

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Repair Difficulty

Hard 4/5

Required Part

Line Fuse / Noise Filter Board
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