- 123.hp.com »
- HP Laserjet Pro Printers »
- HP Laserjet Pro m521dn Printer »
- HP Laserjet Pro m521dn Troubleshooting
HP Laserjet Pro M521dn Troubleshooting
Why is 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).

Why won’t my HP Laserjet pro m521dn print
- The HP laserjet pro m521 printer not printing issue could occur due to a poor power connection. Overcome this by going with the steps given below.
- Check the power connection of the printer by ascertaining that the power cable linked to the device isn’t loose.
- Wiggle the cable to check if it is properly inserted. Check the cable for any damage.
- Test the wall outlet for any power problems. Replace it if required.
- Check if the toner cartridges are properly installed.
- Open the access door of your printer and check if the drum assembly is intact.
How to solve HP Laserjet Pro m521dn print quality?
- Perform the solutions below to get a good print quality paper.
- Print using different software on your computer.
- Choose the paper type for setting the print job.
- Check if the print quality is smeared, fuzzy, dark, curled, scattered, loose or small.
- Verify the paper type setting on the device.
- Check the status of the toner cartridge.
- Make sure the input tray is loaded with paper.
- Select the Service menu and go to Cleaning Page.
- Load plain letter or A4 paper when prompted.
- Select the OK button to commence cleaning.
- Check the paper and printing environment.
- Adjust the color settings, setting them to low will lead to dull prints.
- If none of the HP Laserjet Pro m521dn troubleshooting issues work, replace the toner cartridges and reset the printer.
How to solve HP Laserjet Pro m521dn Paper jam & Feed problem?
- If this isn’t the issue, look for paper jams.
- Use a flashlight and check the input and output trays for jammed paper.
- The carriage access door needs to be opened.
- Look for bits of paper that are stuck in the carriage path or rollers.
- Remove this paper carefully as this could damage the interior components of the printer.
- Open the Automatic Document Feeder assembly and check if the rollers inside are damaged or loose.
- Replace these rollers if required.
- Use a flashlight and check the rollers inside the input tray for any damage.
- If none of the above solutions work, get in touch with our support team.
HP Laserjet Pro m521dn Scanner Error
- You can overcome scanning issues with the laserjet pro m521dn printer by updating the printer firmware. If this doesn’t work, carry forward the instructions given below.
- The scanner lid needs to be opened.
- Now check if the printer scanner setup platen is damaged.
- Open the ADF assembly and take out any jammed paper if present.
- Get the latest version of the HP Print and Scan Doctor tool installed on your computer.
- Run the Diagnostics option and check if the scanning issue persists.
- Remove the USB cable from the printer and reattach it.
- Go to the Control panel option of your computer and choose Programs -> Programs and Features.
- Select Uninstall the HP Print software opens.
- Re-install the software to check if the HP Laserjet Pro m521dn troubleshooting issue persists.
- If so, call our techies.