Dishwasher does not start at all, no lights or display, completely dead.

Safety first: Before opening any panels, ensure the appliance is unplugged. Work only on de-energized circuits.

• Check household supply: Verify the circuit breaker or fuse for the dishwasher circuit is not tripped. Test the wall socket with another appliance.
• Inspect power cord: Look for cuts, burns, or crushed sections on the dishwasher's power cord. Do not use the appliance if the cord is damaged; replace it.
• Test on/off switch: If your AEG model has a mechanical power switch, ensure it clicks firmly. A failed switch or mains filter module inside the base can interrupt power and should be tested and replaced by a technician.
• Professional diagnosis: If the socket and cord are good but the dishwasher remains dead, the internal mains filter or control board may have failed and requires professional service.