Your blender will not start working while the safety lock is locked. Please put the blender jar in the correct position so the built-in safety lock is unlocked.
For this, make sure you have turned the blender jar, mill, chopper or tumbler in clockwise all the way until a “click” sound is heard.
Note: Information below apply only for models HR2037/50 and HR2038/20.
If both clips (image below) are not locked in place, your blender will not start working. Make sure that the clips on both sides of the lid are locked in position before use.