To get your printer back online, follow these expert steps that apply to most wired or wireless printers and operating systems like Windows 11 and macOS Sonoma:

1. **Check Basic Connections and Power**
– Ensure your printer is **powered on** with no blinking errors.
– Confirm all cables (USB, Ethernet) are securely connected.
– If wireless, verify the printer is connected to the correct **Wi-Fi network** (not a guest or neighbor’s network). You can print a **Network Configuration Page** on most printers to check connection details[1].

2. **Power Cycle Devices**
– Turn off your printer.
– Restart your router/modem and wait 30–60 seconds.
– Restart your computer.
– Turn your printer back on[1][4].

3. **Adjust Printer Settings on Your Computer**
– **Windows 11:** Go to *Settings > Bluetooth & Devices > Printers & Scanners*. Select your printer, open the print queue, then click “Printer” on the toolbar and uncheck “Use Printer Offline.” Also, ensure the printer is set as the default if needed. If problems persist, try removing and re-adding the printer[1][3].
– **macOS Sonoma:** Go to *System Settings > Printers & Scanners*, select your printer, open the print queue, and click “Resume” if it appears paused. If your printer supports AirPrint (like HP ENVY Photo 7820), make sure both Mac and printer are connected to the same network, either via Wi-Fi or Ethernet for more stability[1][2].

4. **Additional Tips**
– If you are using an HP printer and see “offline,” unplugging the printer while it’s on, power cycling the router, and then restarting everything helped many users restore connection[4].
– Verify that your printer’s firmware and your computer’s OS are updated to avoid compatibility issues.

This comprehensive approach should restore your printer’s online status and ensure stable printing[1][2][4].