After installing Windows 8 Dell Latitude E6410 have blank screen now

Hey guys my laptop has the following specifications:

Processor: i5  2.67 GHz

RAM: 4 GB

HDD: 500 GB

BIOS version: A15

I installed windows 8 to my laptop and after installation it worked fine for twenty mins but later a black screen appeared and the display went off. I restarted my computer but couldn't help, it shows the Dell Logo at start, even windows logo too but when it comes to Welcome Screen the display wents off.

I'll be very thankful to you please help me out. I am a student and i am having study losses because of this.

Regards,

Naqi