Question about HP LaserJet 4600dn Color Printer

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Vertical dots on print output

I need help diagnosing what is causing tiny dots spaced 1 1/2 inches apart going down the page (vertical) from top to bottom. I have searched hp's tech support on print trouble shooting and they do not mention this problem.
(Mine is not a dn printer - just the basic 4600)

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  • Village Papery Nov 12, 2008

    Thanks Dave. I finally figured out that that was the problem.

  • riknoc Jan 08, 2009

    We have the same problem. It is a strip about 1.5in wide down the left side of the paper. It is made up of dots that are randomly spaced and they are all four different colors. The problem started after a paper jam was cleared and then the dots started to show up. We have replaced the image transfer unit already with no effect. Since it is all four colors, I don't believe it is a color cartridge issue. Please someone help!

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1 1/2 inches apart would correspond to the diameter of the primary charge roller. You have one chrarge roller inside each toner cartridge so you need to determine which color the dots are and then replace that cartridge.

Posted on Nov 11, 2008

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