A dead appliance often has a simpler cause than expected.
Start Here
Verify the outlet with a known load.
Check breaker/rcd/gfci status.
Inspect cord and plug.
Check door/lid interlocks.
Look for an accessible internal fuse.
Appliances rarely fail in a way that names the defective component for you. A dead appliance often has a simpler cause than expected. For appliance is completely dead, concentrate on power, heat, airflow, water and mechanical loads. Use every working function as evidence: if one stage still behaves normally, that fact eliminates causes that would have stopped the appliance earlier in the sequence.
Observe the timing before touching anything. Note what happens immediately after Start, what changes just before the fault, and what remains normal afterward. Lights, relay clicks, water movement, motor or fan sounds, heat, vibration and error codes are useful only when tied to a point in the cycle. A fault that appears instantly is a different problem from one that appears only after the machine warms up or reaches a later stage.
Begin with the cheapest conditions to verify: verify the outlet with a known load, then check breaker/RCD/GFCI status. Do not merely glance at them. Compare the actual condition with the manual, correct anything obviously wrong, and retest before moving deeper. Simple installation, maintenance and user-setting problems regularly imitate failed electrical parts.
If those checks pass, move to inspect cord and plug. Then decide whether check door/lid interlocks can be evaluated safely with power isolated. Choose one test that answers one question: blocked or clear, open or closed, free or jammed, intact or electrically open. If a test result would not change your next decision, the test is probably not worth doing.
Avoid resetting a breaker repeatedly, using extension cords as a permanent fix, and replacing a control board before supply checks. All three skip evidence and can turn a minor fault into an expensive one. After a correction, reassemble guards and connectors, restore normal settings, and reproduce the original operating conditions. A single successful start is not proof; the original symptom must stay gone through the stage that used to fail.
A Safe Step-by-Step Check
Document the exact symptom and pay special attention to verify the outlet with a known load.
Remove external causes first; specifically verify check breaker/RCD/GFCI status.
With power isolated where required, inspect inspect cord and plug and then evaluate check door/lid interlocks only if it can be done safely.
Reassemble fully and run a controlled test under the conditions that previously caused the fault.
Common Beginner Mistakes
Resetting a breaker repeatedly.
Using extension cords as a permanent fix.
Replacing a control board before supply checks.
STOP AND GET HELP: If the next useful test requires exposed live mains, defeating a safety interlock, opening a sealed refrigeration circuit, disturbing gas controls, or entering a microwave high-voltage section, the diagnosis has reached the professional-service boundary.