Babycook® may not be properly plugged in. Check that the appliance is properly plugged, do not attempt to modify the plug in any way.
The bowl lid and/or the bowl are not correctly attached. When positioned on the base, turn the bowl clockwise until you hear a click and the bowl will not turn any further. Then make sure the lid is also locked by re-opening it and then closing it while pressing on the rubber arrow on top of the locking arm that holds the lid until you hear a click.
There is no nut on the knife blade. Reattach the nut. Correctly fasten the nut with the flat side in contact with the metal part of the bowl and turn the nut counter-clockwise.
You hear the motor running but the blade does not turn. If this is happening, the rotating belt is not in contact with the pulley inside the machine. In this case, either the base or the whole product may need to be replaced.
The motor is not functioning properly. In this case, either the base or the whole product may need to be replaced. Proper attachment of the blade, gasket and locking nut
If your Babycook® is leaking or not blending, you may just need a little tutorial on how to secure the blade to the bowl. Watch this video