Your Philips Blender has a safety system in place to prevent the blender from starting if 1) the jar 2) the chopper (specific models only) or 3) the mill (specific models only) is not properly attached to the motor unit.
The information on this page applies to the following models:HR2157/92 , HR2059/90 , HR2051/00 . Click here to show more product numbers ›