Hi, I dropped my dell inspiron 15 3521 and the screen broke, so I bought a replacement and fit it, but now when I turn it on the power in indication light goes green, the fan goes and that's it, no light or even any action from the hdd whatsoever or even the screen, no beeps, and I just need to tap the power button to switch it off not holding in as usual!! Please someone help me please thank you, im lost without my laptop, its like losing a limb, it would be the best Xmas gift anyone has ever gotten me! Lol