[URGENT] Studio XPS 1647 - Black screen.

my Studio XPS 1647 having a black screen problem from yesterday when i playing games. 
Suddenly , the screen freeze , sound lagging and auto restart. 
Afterward when i turn back on, nothing but a black screen , exhaust  fan working and only the Bluetooth icon light up(no startup sound)
After this happen , i tried to restarting with holding down the startup button , still the same.

 Hope Dell can help me solve this problem.