On an HP Photosmart 1215 printer. It says Black Cartridge Failed, Replace black cartridge. It did work, now it does not. I tried another cartridge. No help. Cleaned electrical contacts. No help. Uninstalled, and reinstalled printer. No Help. I have owned this printer for several years, with no problems. It did a great print job until now. I do not want to use it for a doorstop. Hoping someone can help me.