Some printers have 2 black cartridges - one for text and one for images - it might be that you've replaced the wrong one. Next, is the cartridge an HP one, or a third party? Is it new, and was it sealed?
Finally, check the electrical contacts to the cartridge, just in case there is something stopping the signal getting to it.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.