Red streak appears down the left side of the page

JD4556 · ‎04-16-2023

Recently my printer started printing a red line down the left margin of the paper. It only does this when auto-duplexing.

I replaced the Magenta toner cartridge and I'm still having the issue.

There is a red band on the foam rubber roller right where the red steak appears.

Is there something that needs to be cleaned?

Repairatrooper · ‎04-16-2023

Model would be helpful. If the previous cartridge was leaking then it might take some pages to clean the spilled toner out. There could also be excess toner somewhere else in the printer. You can try wiping the roller with a dry, lint free cloth, wiping towards the edge of the roller.

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JD4556 · ‎04-19-2023

I appreciate your help in this.

It's a M431dn, and it's almost 12 years old.

Unfortunately, that didn't solve the problem. Is there a way to vacuum it out?

Repairatrooper · ‎04-19-2023

Vacuums for toner have ultra fine filters to prevent particles from being ejected into the air. If you can see toner inside the printer that would be the best, but make sure you are protected from airborne particles.

If you find the information provided useful or solves your problems, help other users find the solution easier by marking my post as an accepted solution. Clicking "yes" on "was this reply helpful" also increases the chances that this solution will help others.
I am a volunteer, offering my knowledge to support fellow users, I do not work for HP nor speak for HP.

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