Troubleshooting My Philips blender is not working If your Philips blender does not start working, there might be some possible causes. Find out how here to resolve this. The safety lock is locked 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. The rotary knob is not pointing to "OFF" Make sure the knob is pointing to “OFF” before you switch on the blender. After that, rotate it to the desired program.