Ice maker will not power on, display is dark, no interior lights or sounds

Safety first: Unplug the ice maker or switch off the circuit breaker before removing any panels. Do not work on live circuits.

Step-by-step checks:

• Verify wall power: Plug a lamp or meter into the same outlet to confirm 230 V AC supply. If no power, check the home breaker and outlet.
• Inspect power cord: With the unit unplugged, check the De Dietrich power cord for cuts, burns, or kinks. Replace if damaged.
• Access rear service panel: Remove the lower rear metal cover (usually held by Torx or Phillips screws). Locate the power filter module and main control board.
• Check internal fuse: On many De Dietrich ice makers, the main PCB has a small glass or ceramic fuse. Test it with a multimeter for continuity. Replace only with the same rating if open.
• Check harness connections: Reseat the main power harness from the filter module to the control board. Look for signs of overheating or corrosion on connectors.
• Test incoming voltage at PCB: If you are qualified and using proper insulated probes, confirm that mains voltage reaches the power filter and then the main PCB. If voltage is present but the board is dead (no LEDs, no response), the board is likely faulty.

When to stop: If you are not comfortable testing live voltage or the main PCB shows burn marks or swollen components, stop and contact a professional technician. Replacing the main control board requires careful handling of static-sensitive electronics.