Black+Decker
No power / primary power failure
Microwave does not start at all; display is blank and no lights or sounds when door is opened.
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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 board
How to Fix / Troubleshooting
Safety first: Unplug the microwave before opening the cabinet. Internal components can still hold charge.
- Check outlet:
- Test the wall outlet with another appliance.
- Reset any tripped circuit breaker or GFCI.
- Inspect power cord:
- Check for cuts, burns, or kinks in the Black+Decker power cord.
- Check internal fuse (if qualified):
- Remove the outer cabinet.
- Locate the ceramic line fuse near the power cord entry or noise filter board.
- If blown, investigate for underlying causes (shorted HV components, door switch issues) before replacing with the exact same rating.
If the new fuse blows immediately or you are not comfortable working inside the unit, stop and contact a professional technician.
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Repair Difficulty
Hard
4/5
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