If the device was brand new it would have been tested ex factory and it's probably safe to assume it was working when boxed. Lets assume the plug fuse is ok and that the wall socket is also giving power, we move on to the machine. When you fit the mixer bowl to the device the bowl has a lug on the bottom that activates a micro-switch in the body of the machine. You should be able to hear/feel a click when you turn the bowl to activate the switch - perhaps thats the problem area.