A year and half old Toshiba Satellite C850 laptop, abruptly turned off while running normal. It does not turn on any more. Power light turns white and then another amber light comes up a few seconds later. The LCD remains off. HDD is activated but the cooling fan does not work. Removed the battery and power inlet and pressed the power button, but it does not work. Can any one suggest that a faulty fan could stop the computer from turning on? Any help would be appreciated.