An HP Envy 4500 printer is offline for a number of different reasons, like connection issues, software issues, or printer-related issues. A damaged or poor USB cable or Wi-Fi connection are examples of connectivity issues. Software issues like inaccurate drivers, as well as incorrect settings. Another possibility is a problem with the printer or the computer to which it is linked. To resolve, check the connections, update drivers, restart the printer and computer, and verify that the printer status is "Ready" in the Devices and Printers settings menu.