Ice maker will not power on, display shows E1 or flashes once repeatedly, no internal lights or operation.

Safety first: Unplug the ice maker from the mains supply or switch off the circuit breaker before removing any panels.

Step-by-step checks:

• Verify power supply: Confirm the wall outlet has 220–240 V AC using a multimeter. If there is no power, check the household breaker and outlet.
• Inspect power cord and plug: Look for burn marks, cuts, or kinks on the Bauknecht power cord. Replace the cord set if damaged.
• Access the control PCB: Remove the rear or top service panel (depending on model). Locate the main control board assembly.
• Check connectors: Reseat all multi-pin connectors on the control board. Look for corrosion, bent pins, or loose locking tabs. Clean light oxidation with contact cleaner.
• Check board fuse: Many Bauknecht ice makers have a small glass or soldered fuse on the PCB. Test for continuity. If open, the board may have an underlying short; replacement of the entire PCB is usually recommended.
• Visual inspection: Look for burnt components, bulged capacitors, or darkened areas on the PCB. If present, replace the main control board rather than attempting component-level repair.

When to stop: If the unit still shows E1 after power cycling and connector checks, the main control board is likely defective and should be replaced by a qualified technician.