Summit
No Power – Line Fuse or Power Input 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 line fuse, Failed noise filter board, Loose power cord connection, Tripped household circuit breaker
How to Fix / Troubleshooting
Safety: Unplug the microwave before any inspection. Never bypass or oversize a fuse.
User-level checks:
- Verify the outlet has power by plugging in another appliance.
- Check your home's circuit breaker or fuse panel and reset/replace as needed.
- Ensure the microwave is plugged directly into the wall outlet.
Internal checks (for experienced DIYers):
- Remove the cabinet and locate the line fuse near the power cord entry.
- Test the fuse for continuity; replace only with the exact same rating if blown.
- Inspect the noise filter board and wiring for burns or loose connections.
If the new fuse blows immediately, stop and have a technician diagnose for shorts in the high-voltage or control circuits.
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Repair Difficulty
Hard
4/5
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