Washer-dryer will not power on at all; no lights or display

Safety first: Ensure the outlet is live and correctly wired. Unplug the appliance before internal checks.

Step-by-step checks:

• 1. Verify outlet and breaker: Test the wall socket with another appliance and check the circuit breaker or fuse.
• 2. Inspect power cord: Look for visible damage. Replace if any cuts or burns are present.
• 3. Check mains filter and fuse: Remove the top or rear panel and locate the mains interference filter. Some models have an internal fuse on the main PCB; visual inspection may reveal a blown fuse, but replacement should be done by a qualified person.
• 4. Main PCB: If power is present at the filter output but the board is dead, the main control board power supply is likely faulty and the board must be replaced.