Dell inspiron N5010 blank screen at startup

Hello,

I have an issue with my Inspiron N5010 screen, intel core i5.

It showes black screen when switching my laptop on, but everything else is working like (Led indicators - Optical drive - the Fan - Beep and windows sound) also the processor indicator and power on lights remains on.

I've tried the old method of Removing the battery/AC and holding down the power button for 60 secs, also tried to press the "D" button and power button, but these methods doesn't work in my case.

Ones it has happened to me before two weeks and when I tried again it worked fine, but now isn't working.