To get your HP printer online, follow these steps:

1. **Check the printer connection** — Ensure your printer is properly connected to your computer via USB or to your Wi-Fi network if wireless. Make sure cables are secure and Wi-Fi settings are correct[2].

2. **Restart devices** — Turn off your printer, unplug it, restart your computer and router, then power the printer back on. This simple reset often resolves offline status[2].

3. **Set the printer as default** — On your computer, go to Control Panel > Devices and Printers, right-click your HP printer and select “Set as Default Printer” to ensure your computer uses it for printing[2][4].

4. **Use HP Print and Scan Doctor** — Download and run this HP utility to diagnose and fix connection problems. It can guide you through updating drivers and settings[4].

5. **Check printer port and services** — Confirm the printer port settings in printer properties and ensure related Windows services (like Function Discovery) are enabled and running[4].

6. **Use the HP Smart app** — Download the HP Smart app from HP’s official site (123.hp.com), add your printer, and follow the guided setup to configure and troubleshoot your printer connection[1][5].

Make sure your printer is powered on and on a stable surface near your computer or wireless router. Follow any on-screen instructions during setup[1][3].

These steps cover most causes of an offline HP printer and should help you get your printer online quickly. If issues persist, refer to your printer’s manual or HP support for model-specific assistance.