Oven display and controls are dead; no lights or response when turning knobs or pressing buttons.

Safety first: Before opening the appliance, verify that the circuit is isolated and locked off if possible.

• Check external supply: Confirm that the wall switch or cooker isolator is on and that the household breaker has not tripped.
• Inspect terminal block: Access the rear of the oven and check the mains terminal block for tight connections and signs of overheating.
• Internal fuse: Some Candy ovens have an internal fuse on the control board or power filter. Check and replace with the exact same rating if blown, but investigate the cause of failure.
• Control board: If supply and fuse are good, the main control board power supply may have failed and will likely need replacement.