How do I resolve HP Printer is offline error?
A WI-FI-like ethernet link is that you just bring the printer online and connect it to a network. You just plug the hard-line cord into your internet port to do this, and voila, it's online. If you are running without a firewall in a fundamental network, click Print on the document and pick the printer. If you have a firewall and the printer on your network is not approved, you need to install it on the network by following the prompts and entering the network key or password.
Computers & Internet - HP
Answers & Comments
Https://support.hp.com/id-en/topic/diagnostics?category=printing&issue=printer-offline
try the link above it is a diag program online for HP Printers. Good Luck.