Barcode printing with grey lines

[Gye1]

Hi,

Everything was printing fine until I changed the toner with HP replacement toner. 

Now when I print a page that has a barcode on it, the barcode prints with extra lines in all different shades of grays. 

Please help me fix!🙏

[Nal_NR]

Hi @Gye1,

Welcome to the HP Support Community. 

I'd be happy to help you! 

I understand that you are having issues with the print quality issue.

Step 1: Use genuine HP toner cartridges

HP recommends that you use genuine HP ink or toner supplies. HP cannot guarantee the quality or reliability of non-HP or refilled cartridges. If you do not use genuine HP cartridges, the steps in this document might not resolve the issue. To check the authenticity of your cartridges, go to the HP anti-counterfeit webpage (in English).

Purchase replacement cartridges and other supplies from the HP Store or local retailers.

Print another page. If using genuine HP toner cartridges did not resolve the issue, continue to the next step.

Step 2: Check the paper

The quality and type of paper can affect the print job. Follow these guidelines to make sure the paper is appropriate. If it is not, load an appropriate paper type.

NOTE:

To purchase paper in the United States and Canada, go to the HP Store.

Use paper designed for HP LaserJet printers. Do not use paper designed only for inkjet printers.

Do not use paper that is too rough. A smoother paper might result in better print quality.

After loading the appropriate paper in the tray, print another page. If the issue persists, continue to the next step.

Click here for the remaining steps. 

Update the firmware. Click here

Hope this helps! Keep me posted for further assistance.

 Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.