Blomberg
No Power – Primary Supply Failure
Microwave completely dead; no display, no light, no 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 line fuse,Open thermal cut-out on cavity or magnetron,Defective power cord,Failed control board power supply
How to Fix / Troubleshooting
Safety: Unplug the microwave before inspection. Internal components may still hold charge.
User checks:
- 1. Check outlet: Test the wall outlet with another appliance. Reset any tripped circuit breakers.
- 2. Inspect power cord: Look for visible damage. If the cord is damaged, do not use the microwave.
Advanced checks:
- 3. Internal fuse: Remove the outer cabinet and locate the line fuse. If blown, determine the cause (shorted component, surge) before replacing with the exact same rating.
- 4. Thermal cut-outs: Test cavity and magnetron thermal cut-outs for continuity. Replace any that are open and not resettable.
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Repair Difficulty
Hard
4/5
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