Ensure that your black ink cartridge has sufficient ink. Replace the cartridge if it’s low or empty. Most HP printers have a built-in tool for diagnosing print quality issues. Use the printer’s control panel or software on your computer to run a print quality diagnostic or alignment test. This can often help identify the issue, such as clogged nozzles or misaligned printheads. To know more about hp black ink not printing. If the print quality diagnostic indicates an issue with the printheads, your printer might have clogged nozzles. HP printers usually have a utility for cleaning printheads. You can access this through the printer’s control panel or the printer software on your computer.