We look for two things when the VRT juicers do not turn on and majority of the time it is simply the way the hopper is put onto the bowl. The juicer must be completely assembled to turn on. The first thing to do is find the half-moon shaped or semi-circle tab with the arrow on it. This tab juts out from the rim of the hopper (cover.) The hopper can be locked onto the bowl three different ways but only one will actually engage with the juicer and allow it to turn on. The tab on the hopper has a magnet that engages with the juicer. If the tab is not right over top of the open/close on the post of the motor housing, the juicer will not turn on. If you do have the tab over the open close and the juicer will not turn on take the hopper off the bowl and look at the underside of that tab. The underside of the tab should be covered with plastic, if there is a hole then the magnet fell out which again will not allow the juicer to turn on. If the magnet has fallen out I can replace the hopper for you. We have many customers who have their VRT juicer for years and one time just happen to put the hopper on incorrectly, so I would make sure to double check that. If this does not work, then the juicer will have to be sent to our service center.