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

Safety first: Before touching any internal parts, switch off the circuit breaker and unplug the dishwasher if possible.

• Check household supply: Verify that the wall socket has power by testing with another appliance. Reset any tripped breakers or replace a blown fuse with the correct rating.
• Inspect power cord: Check the dishwasher's power cord for cuts, burns, or loose connections at the terminal block.
• Check mains filter: Access the mains interference filter (usually near the power entry). Look for burnt components or melted casing. If damaged, replace the filter.
• Control board check: If power reaches the control board but there is no response, the board's low-voltage power supply may have failed.

Work on live mains components is hazardous. If you are not experienced with electrical repairs, contact a qualified technician.