I have a two year old Asus UX333FAC that won't turn on. When I press the power button nothing happens. The screen remains completely black with no boot up sequence or display. The laptop is fully charged. The battery indicator is slowly blinking white. There was a system or Windows upgrade immediately before the problem occurred. The laptop won't boot up either on battery or with the charging cable plugged in. I've plugged an external monitor to see if it is a screen problem. The external monitor doesn't display either. I've tried to boot to an Ubuntu live disk without luck. Any suggestions would be appreciated.