Lenovo yoga 2 pro screen not turning on

[enzom09]

So over the past few weeks, everytime I restarted my yoga 2 pro (usually after win update) the screen would go black for over half an hour during the restart process and wouldn't turn on. Last night when I restarted it for win update it went black and still hasn't turned on. The machine definitely powers on because I can turn the backlit keys on and off but that is the only sign of life from it. Any suggestions?!