Screen Blank

Hello,

I have tried everything i could to get the image on my lapie but still not showing. For two days now keep pressing fn+F1 also fn+F2 and fn+ F3 as well as fn+F4 but nothing comes out. Tried removing the battery, still nothing comes out. I think the problem might be with the system. Please help me guys as I'm not prepared to buy new laptop, one I'm using its very new. 1 year old HP 635.