Microwave does not start at all; display is blank and no lights or sounds when door is opened.
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.
Possible Causes
How to Fix / Troubleshooting
Safety: Unplug the microwave before any inspection. Do not bypass fuses or thermostats.
External checks:
- Verify the wall outlet has power by plugging in another device.
- Check the household circuit breaker or fuse for the microwave's circuit.
- Inspect the power cord for visible damage.
Internal checks (qualified DIYers):
- Remove the outer cabinet to access the line fuse (usually near the power cord entry) and thermal fuses on the cavity or magnetron.
- Test fuses for continuity with a multimeter. Replace only with identical rating fuses.
- If a fuse is blown, inspect for underlying causes such as shorted components before replacing.
When to call a technician: If fuses blow again immediately or you cannot identify the cause, have a professional diagnose the high-voltage and control circuits.