Screen black

Hi all,
I installed windows 8 to my machine. it has intel hd graphics. I can install it fine but once i try boot Windows 8 the screen goes black (screen is actually off). I can get it to work by plugging in a HDMI cable into thee hdmi slot and use a monitor. it works perfect like that but my laptop screen stays black. It must be the graphics driver. I tried updating the graphics driver and that didnt work. I then tried installing the driver from the dell site for Windows 7 and that didnt work.Any ideas?
I have Dell Inspiron N5110.Hello,

pls help me ..............................plssssssssssssssssssssssssss