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How to Troubleshoot Laser Printer Vertical Lines on the HP LaserJet 4000


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At the point when your HP LaserJet 4000 is being used, the toner is heated up and fused to the paper to print your text or pictures. During the course of normal operation, the different plastic feeds and rollers inside the printer may become dirty, which infrequently causes vertical lines to show up on your prints. You don’t have to purchase another printer to fix the issue. Getting rid of the vertical lines just requires cleaning within the printer or replacing the toner cartridge.


  • Hold down the LaserJet 4000’s power button for three seconds to power off the printer. Unplug the 4000’s power cable from the wall outlet.
  • Lift open the plastic cover at the highest point of the HP LaserJet 4000. Hold the front end of the plastic toner cartridge and draw it forward marginally. Lift the cartridge out of the LaserJet 4000.
  • Use a delicate material to wipe off the uncovered plastic paper encourage manage toward the back of the open range inside the HP LaserJet 4000. Lift up the green handle at the far right end of the plastic rectangular paper get to plate. The plate is situated toward the front of the open territory.
  • Wipe off both sides of the paper get to plate. Push the green handle down and slide the toner cartridge back inside the HP LaserJet 4000.
  • Set the top plastic cover down and connect to the LaserJet 4000’s link. Turn on the printer and print a content report to check whether vertical lines still show up.
  • Unplug the printer and open the top cover again if the lines hold on. Haul out the toner cartridge and embed another HP 27A or HP 27X toner cartridge. Close the top cover and power on the printer.

If you are facing any kind of issues call us on our toll-free number 1-800-293-9401.

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