If your HP printer isn’t printing black, check if the black ink cartridge is low or blocked. You can clean the printhead through the printer’s settings and make sure the cartridge is installed correctly. Updating the printer drivers or running a self-check can also help fix the issue. If it still doesn’t work, you might need to replace the black ink cartridge.
https://www.hpprintersupportpro.us/blog/hp-printer-wont-print-black/

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