When I press the on button, nothing happens. There is a green light illuminated on the motherboard in the top right hand corner, next to the blue cable that goes to the hard drive. This may sound silly but does the board which the power up button, USB's and headphone sockets have a cable that goes below the blue cable on the motherboard. There is the data cable that runs off the board that runs to the very top right hand side of the motherboard with a yellow pull handle . If someone can advise me of the possible problems or the part code to order a new power board (if ness.) I would be greatfull.