You can try a few solutions to HP printer offline fix this issue. First, check that the printer is turned on and connected to your computer. If it's still offline, try restarting both your computer and printer. Additionally, you can try unplugging the printer's power cable and plugging it back in. Finally, try reinstalling the printer driver. If these steps do not work, contact HP customer support and get help from there. https://www.myprinterisoffline.com/hp-printer-offline