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

Safety: Always turn off the breaker before opening electrical junction boxes or accessing internal wiring.

• Check household power: Verify the dishwasher's circuit breaker is ON and not tripped. Reset if necessary.
• Inspect junction box: Remove the toe-kick panel and open the metal junction box. Confirm wire nuts are tight and no wires are burnt or disconnected.
• Test door latch switch: If the unit has power but no response, remove the inner door panel and test the latch switch for continuity when closed. Replace the latch assembly if the switch is open.
• Check control board: If power is present at the board but there is no display or response, the main control board is likely failed and should be replaced.