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BuffForLife Student
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Every page out of CP1025NW has a thick blank line down the middle of the page.

HP LaserJet Pro CP1025 Color Printer series
Microsoft Windows 8 (64-bit)

After I changed the black toner of my CP1025NW, every page out of the printer has a thick blank line down the middle regardless of print color. I tried reinstalling the old toner back into the printer, but it did not return to normal. I have gone through all the other troubleshooting options for print quality issues, none of which helped.

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Teacher
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Every page out of CP1025NW has a thick blank line down the middle of the page.

Can you please provide a picture of the printout ? 
Does the toner come off of the line if you swipe a finger thru it.
If it does not come off the paper, its definetly the drum unit. 

Follow these steps to replace the imaging drum.
  1. Open the print cartridge door.
    Figure : Open the print cartridge door
    Image: Open the print cartridge door.
  2. Open the front cover.
    Figure : Open the front cover
    Image: Open the front cover.
  3. Lift the two levers that hold the imaging drum.
    Figure : Lift the imaging drum levers
    Image: Lift the imaging drum levers.
  4. Remove the old imaging drum.
    Figure : Remove the imaging drum
    Image: Remove the imaging drum.

There you will see a shiny roller, the line must be there. If so... replace it.

I`m not a HP technician.
Just a electronics enthusiast .
If i helped, please hit that Kudos button :)
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Intern
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Message 3 of 3
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Every page out of CP1025NW has a thick blank line down the middle of the page.

Check and find if there's something block the laser ray.

oftenly it's just a hair or a piece of paper.

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