do u see any sign of life when u press the power button? if you do den u can try one thing first( taking the battery out and try without the battery), if that doesnt work take the memory out and put it back...if that doesnt work..use the vga cable and try on the external monitor....if u still cant see the display den ur problem is with the video card which is integrated inside..so the cost of motherboard is 150-200 dollars..check it with the mfg might get that for cheap price..and after that google how to install the mother board for ur specific model online with another computer...try to look around if u invest 20-25 mins u will find pics for it...and u will save 100s..
good luck and cheers.