My Nikon D7000 would not turn on

At first i thought i had an empty battery but after i fully charged it and put it in the camera showed no sign of power, the viewfinder stayed dim and the small display didn't show the number of remaining shots as it usually did and the camera won't turn on! What should i try to do before i send it to nikon?

Take it to the camera store where you bought it, it might be just the battery that is dead - they can try with a different battery. That's unlikely though.

Given that it's most definitely still on warranty, just send it back or even ask for a replacement instead of having it repaired. There's no reason to take chances.

It may be that having too much charged the battery distorted, and many other reason may causes for it so first take it for a shop and don't do any activity over it

Nikon? Bring it back to the store you bought it from. Don't forget the sales receipt.