HP Laserjet Pro m521dn Offline
- Power cycle and verify whether the HP Laserjet Pro m521dn troubleshooting issue persists.
- Choose Devices and Printers list from the control panel of your computer.
- Right click on the printer which is in the list. Select the Default printer icon.
- Click See What’s Printing and choose Printer. Make sure to choose the correct port.
- Click See What’s Printing and choose Printer. Make sure to choose the correct port.
- You need to uncheck the Use Printer Offline option.
- Try to link your printer and check if the issue has resolved.
- If not, ensure that the router lights are blinking properly.
- Ascertain that the router provides an uninterrupted internet supply to your computer.
- If an unstable internet connection persists, contact your ISP (internet service provider).