If your HP Envy printer is offline, there are a few things you can try to get it back online: 1) Check that the printer is turned on and connected to the same network as your computer. 2) Restart your router and printer. 3) Check that the printer is not in an error state by checking the printer's control panel. 4) Ensure that the printer driver is up to date. 5) Try reinstalling the printer driver. 6) If all else fails, contact HP customer support for further assistance.