Microwave will not start at all; display is blank and no lights or sounds.
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 Warning: Unplug the microwave before opening the cabinet. Internal components can be hazardous.
Basic checks:
- 1. Verify outlet: Test the outlet with another appliance. Reset any tripped GFCI or breaker.
- 2. Inspect power cord: Check for cuts, burns, or kinks. If damaged, do not use the microwave.
Internal fuse (advanced DIY):
- 3. Access fuse: Unplug the unit and remove the outer cover. Locate the glass or ceramic line fuse near the power cord entry or noise filter board.
- 4. Test fuse: Use a multimeter to check continuity. If open, replace with the exact same rating specified by RCA.
If the new fuse blows immediately, there is an underlying short (e.g., in the door switches, transformer, or control board) that requires professional diagnosis.