F your HP OfficeJet Pro 6978 isn’t printing after changing the ink cartridge, check that the cartridge is correctly installed and the protective tape is removed. Ensure the new cartridge is compatible with the printer model to avoid recognition issues. Restart the printer and computer, and run any alignment or troubleshooting processes available in the printer’s settings. If the issue... https://www.contact-phone-number.com/hp-officejet-pro-6978-not-printing/