The cord is not detected.

1. Turn off the device.
2. Under the device, move the lever towards yourself and take out the black part (connector) of the cord
3. Check the connector for dried Night Cleaner. If there are traces of it, clean them.
4. For PIEZON® only, check the pins on connector with the handpiece. If the pins on the cord are oxidized or have night cleaner inside the pins, clean the pins or replace the cord.

If still not solved, contact EMS aftersales service.