Mitsubishi Electric
No Power / Power Supply Failure
Unit will not power on at all; no lights or display.
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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 fuse on main PCB, faulty power cord, defective main control PCB power supply, tripped household breaker
How to Fix / Troubleshooting
Safety: Unplug the unit before opening. Mains voltage is lethal.
User checks:
- Outlet and breaker: Test the outlet with another device and check the circuit breaker or RCD.
- Power cord: Inspect for cuts, burns, or loose plug blades. Replace the power cord if damaged.
Technician checks:
- Open the unit and locate the main PCB. Check the onboard fuse and replace with the exact same rating if blown.
- Measure AC input and DC output voltages. If the power supply section is dead, replace the main control PCB.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB / Power Cord
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