If your HP printer shows an offline status, it usually means your computer cannot communicate with the device. Start by checking power, USB, or Wi-Fi connections and restart your printer, computer, and router. Make sure the printer is set as default and “Use Printer Offline” is unchecked. Clear pending print jobs and update or reinstall the latest printer drivers if needed. https://sites.google.com/view/my-hp-printer-back-online/home