Dishwasher will not power on at all; no lights or display, no response to any buttons.

Safety first: Before touching wiring, ensure the breaker is off. Use a non-contact voltage tester if available.

Step-by-step checks:

• Verify outlet and breaker: Confirm the kitchen circuit breaker is ON and not tripped. If the dishwasher is on a GFCI circuit, reset the GFCI outlet.
• Check junction box: Remove the toe-kick and open the electrical junction box. Tighten any loose wire nuts and ensure the ground wire is secure.
• Door switch: Ensure the door closes firmly. A misaligned latch can prevent the control from powering up.
• Control board inspection: If power is present at the junction box but the unit is dead, the main control board may have failed and require replacement.

Warning: If the breaker trips immediately when turned on, stop and contact an electrician or technician; there may be a short circuit.