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

Safety first: Before opening the unit, verify power at the outlet with a known-good device. Unplug the washer-dryer before internal checks.

Steps to diagnose:

• Check household power: Verify the circuit breaker is on and not tripped. Reset if necessary.
• Test outlet: Plug in another appliance or use a tester to confirm the outlet is live.
• Inspect power cord: Examine the power cord for cuts, burns, or loose plug blades. Replace if damaged.
• Internal fuse (if equipped): Remove the top panel and check for an internal line fuse on or near the main control board. Replace only with the exact type and rating if blown.
• Control board check: If power is present at the board but no lights or response, the main control board is likely failed and must be replaced.

If you are not comfortable working with electrical components, contact a qualified technician.