To get your HP printer online, try the following steps:

1. **Check the printer connection**
– For USB printers, ensure the cable is securely plugged into both the printer and computer.
– For wireless printers, verify that the printer is connected to your Wi-Fi network.

2. **Restart your devices**
– Turn off your printer and unplug it from the power source.
– Restart your computer and router.
– Plug the printer back in and turn it on, then try printing again.

3. **Set the printer as the default device**
– Open the Control Panel on your computer.
– Navigate to “Devices and Printers.”
– Right-click your HP printer and select “Set as Default Printer.”

4. **Check and clear the print queue**
– In “Devices and Printers,” right-click your printer and select “See what’s printing.”
– Cancel any stuck or pending print jobs.

5. **Ensure printer is not set to offline**
– Open “Printers & Scanners” settings.
– Select your HP printer and open the print queue.
– Make sure “Use Printer Offline” is unchecked.

6. **Update or reinstall printer drivers**
– Outdated or corrupted drivers can cause offline issues. Updating them from the HP website can help restore connectivity.

If none of these steps work, consult HP support or refer to your printer’s manual for model-specific troubleshooting[1][2][4].

These steps cover the most common causes of an HP printer showing offline and how to get it back online.