Induction hob or radiant cooktop does not power on at all; no lights or display.

Safety first: Before opening any covers, switch off the circuit breaker and verify the absence of voltage.

User checks:

• Check the household circuit breaker or fuse for the cooktop circuit and reset/replace if necessary.
• Ensure the cooktop's plug (if applicable) is fully inserted.

Technical steps:

• Inspect the terminal block for loose or burnt connections; tighten them and replace any damaged parts.
• Check internal fuses on the mains filter or control board and replace them only with identical rated fuses.
• If fuses blow again immediately, locate and repair the underlying short circuit before further use.
• If the power supply and fuses are OK but there is still no power, replace the mains filter / input board or main control board as indicated by tests.