One common reason is power failures. It’s common for your HP printer to remain offline following a power outage, even after rebooting your PC and the printer itself. The connection problem can also result from a change in your WiFi or router settings. You must ensure that you enter the right password or settings on your printer. Furthermore, ensure that you don’t set the printer too far from the router. Another likely reason is outdated drivers. With these, you can update them either manually or automatically.