I had a problem that my laptop (MSI-GP60) screen would only go up when connected to an external screen. so I tried to disable the other graphic card - Intel HD graphic 4600 throught Device Manager - Display Adapters. and after that the screen went black, I restarted and got that result:
http://imageshack.com/a/img921/484/c4W0sv.jpg
http://imageshack.com/a/img922/5517/3lBJnY.jpg
As you can see windows is turning up but there is a problem with the graphic card.
![c4W0sv.jpg](/proxy.php?image=http%3A%2F%2Fimageshack.com%2Fa%2Fimg921%2F484%2Fc4W0sv.jpg&hash=24fb9c476fa3e1de8fd5e4d2a2bbb320)
http://imageshack.com/a/img921/484/c4W0sv.jpg
![3lBJnY.jpg](/proxy.php?image=http%3A%2F%2Fimageshack.com%2Fa%2Fimg922%2F5517%2F3lBJnY.jpg&hash=e80cc23d5761be378faf08faf53aed25)
http://imageshack.com/a/img922/5517/3lBJnY.jpg
As you can see windows is turning up but there is a problem with the graphic card.