[guide|39473]
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwiBg5zMzd7VAhXC1CYKHTPADKkQtwIIdDAD&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DoMY5pPais8I&usg=AFQjCNFJ4Dk79fuNEiy8XuPqbibfeaXRwg
I couldn't find a replacement guide on the Coolpix B500, but above are links to an ifixit guide for the P510, and a youtube link for the P500. Looking at pictures of the B500, it appears the screen is put together similar to the ifixit article of the P510 above, so hopefully that will help.