Question about HP LaserJet 3800dtn Printer

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Horizantal black lines across the page each time I print.

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You have a bad black toner cartridge.

Posted on Jan 17, 2009

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Posted on Jan 02, 2017

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1 Answer

Printer keeps printing lines across the page of 1


Width of head sprayer (head output) of black is about 1". Check nozzle. It might be some point of head spayer distort. See check nozzle ouput. There are tranversal and vertical lines that represent same point of head sprayer. Is the output perfectly straight and no clog at all? Do head cleaning procedure.

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Hp laserjet 4 plus - keep getting a horizontal black line


yes you have to catch printer making the line and then as a page is being printed you need to open door to stop paper after green cylinder(drum) as it is entering fuser, then you need to remove paper from printer without pulling through the fuser, if you see the line then rub your finger across line up and down page, if it smears at all then its the cartridge if not then the fuser

Apr 27, 2009 | HP LaserJet 4 plus Printer

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Printer is printing black lines across all print jobs


Every print job, copy, and fax have the solid black line across the pages. I have changed the drum and the cartridge and even tried cleaning mode. Please help!!! I have a HP Laser Jet 2840 All in One

Mar 24, 2009 | Office Equipment & Supplies

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Mfc-7420 Black Line horizontal across paper in 3 places


try moving the small blue slider on top of the drum cartridge side to side 10 times.

Mar 10, 2009 | Brother MFC 7420 All-In-One Laser Printer

1 Answer

Line across the page


  1. Make a copy by using the platen mode and ADF.
  2. Send a print from your PC or print out the Counter list from User tools/counter button.
  3. Try printing one colour at a time - Black, Cyan, Yellow or Magenta.
If when printing, there is no line across the pages, so you need to clean the optics mirrors and exposure glass.
If the line appears in both 1 and 2 mentioned above, you have the fuser roller or drum damaged.
If the line appears in all colour prints, check the fuser or transfer belt.
If it happens only with one particular colour, check that drum unit.

Good luck and please rate me, thanks.

Feb 02, 2009 | Gestetner DSc328 Copier

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Lines across printed page


try to locate the print head of the unit. you will see a mirror there. clean the mirror maybe it has some foreign object.

Jul 04, 2008 | HP Color LaserJet 2600n Printer

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Black lines across page


are black lines appearing on paper after printing from computer or when a fax is sent or recieved or both?

Jan 15, 2008 | Samsung CLX 3160fn All-In-One Printer

1 Answer

Consistent, faded and streaking vertical lines across entire page, from top to bottom.


Toner issue getting to drum - use gen toner cart.

or Drum blade stuffed (lines are down page fro top to bottom- replace drum assy

Drum has been exposed to light faint or blank across copies repeated 4 times down page - replace drum assy

or upper fuser roller stuffed, down page, smudgy print -  replace fuser

LSU(laser) or boards rarely cause issues

Oct 25, 2007 | Samsung ML 2010 Laser Printer

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