Dishwasher will not power on at all; no lights or display.

Safety first: Before touching wiring, turn off the breaker. Only restore power when testing.

• Check household power: Verify the breaker is on and not tripped. Reset if necessary.
• Inspect power connection: Remove the lower access panel and check the terminal block where the house wiring connects. Tighten loose screws and repair any burned wires.
• Test outlet or junction box: Use a meter to confirm correct voltage is present at the supply.
• Check door switch: If the unit has power but no response, test the door switch for continuity when closed. Replace if faulty.
• Control board: If power and door switch are good but the unit remains dead, the main control board is likely failed and should be replaced.