Samsung
No Power – Primary Power Circuit Failure
Microwave completely dead – no display, no light, no response when 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, Open thermal fuse on cavity, Faulty power cord, Failed main control board power supply
How to Fix / Troubleshooting
Safety: Unplug the microwave before any inspection. Internal fuses are not user-serviceable in many regions due to safety regulations.
- Check outlet: Plug another appliance into the same outlet to verify power. Reset the circuit breaker or replace the wall fuse if tripped.
- Inspect power cord: Look for visible damage, burns, or cuts. If damaged, the cord must be replaced by a technician.
- Avoid opening cabinet: Internal fuses and thermal cut-outs are near high-voltage circuits. Have a professional check the internal line fuse, cavity thermal fuse, and control board.
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Repair Difficulty
Hard
4/5
Required Part
Internal Line Fuse / Cavity Thermal Fuse / Power Cord
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