Laptop black screen

[CbrHunter]

My acer aspire 5536 was working perfectly but now there is a black screen even though the other such as fan power and charging. Why is this problem and how could it be solved. Please help me out.

 

[bootcher]

did you turn off the screen by pressing the function (Fn) key and the F key to turn off the display?
http://en.wikipedia.org/wiki/Fn_key

 

[Ezo Legendz]

If wat bootcher said doesnt work try conecting to a external screen if it still doesnt work there is probably something with the videocard