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I have an HP 4050N Laser Printer. I just replaced the fuser unit and the rollers. The pages are printing with a hazy toner line down the right side of the page. The page is readible, but looks bad. Any suggestions?

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  • brian c
    brian c May 11, 2010

    Was this happening before you replaced the rollers?



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Only 2 possibilities. 1.Bad fuser or badly rebuilt fuser.

2. Bad toner cartridge.
Try to print something. Open the cartridge drawer when you think the paper is right there. The image on the paper is unfused yet; but if you see that print defect right there, you have a bad cartridge. If you DONT see the defect on the unfused image, then your fuser is bad.

Posted on Mar 16, 2009


No. The fuser was going bad though and I replaced only the rollers that were slipping.

Posted on Feb 09, 2008


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2 Answers

How do i stop my printer from leaving ink streaks down the right side of my pages?

I was going to suggest removing the fuser and looking at the rollers, but on this printer it's a major operation.
Instead let's run the half test. Put paper in the manual feed tray(tray 1). Print to the printer. When the sheet of paper gets pulled about 3/4 of the way in, open the top cover. Pull out the toner cartridge. Look down at the paper. Does it have a streak down the right side? If yes, replace the toner, if no, have the fuser replaced.

Oct 21, 2010 | HP LaserJet P2015dn Printer

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The black print jobs have a shadow about 3 inches down the page

I had replaced the fuser - no improvement. I removed the fuser, imaging unit & transfer roller. CAREFULLY using a vacuum cleaner I cleaned all units and the internals of the printer, rotating the roller on the imaging unit to clean all parts. (Warning Place Imaging unit on paper as toner escapes) After a few test prints the page cleared and duplicate ghosting cleared.

Apr 07, 2010 | Xerox Phaser 6360 Laser Printer

1 Answer

When the pages print there are lines on the right hand side of the paper and the Toner is not really fusing(sp?) to the paper. Thanks!


Both of these problems are caused by a defective fuser unit in the printer. This is a user replaceable part. The part number is RG5-2661. You should be able to get one on Ebay.

I hope this helps, if so please rate our solution.

Corporate Computer

Dec 19, 2009 | HP LaserJet 4050n Printer

1 Answer

Prints a black line down the right side of paper


This is a common issue when excess toner is inside the printer and gets on the Fuser roller. Once there, every page that is printed gets the same imprint. Sometimes it is text from a previous page - others are lines like you are seeing.

You will need to get a Maintenance Kit for your printer. This will replace most of the rollers and the Fuser - where the actual problem is.

Here is the part list from Lexmark -,6970,239619818_653293751_1231984621_en,00.html?tabId=1

It looks like the kit will cost around $170.

If you are handy - you may be able to remove the fuser assembly and wipe the excess toner from the rollers. This may or may not work - depending on how much toner is on the fuser and how long it has been there.

Dec 03, 2009 | Lexmark E250dn Laser Printer

1 Answer

Prints light shadow down right side with diagonal white stripes

One of 2 things is defective. The toner or the fuser. Take off the rear door and look at the 2 large rollers. (One is orange on those models I believe.) See if the defect can be seen on the fuser.

Oct 26, 2009 | HP LaserJet 4050n Printer

2 Answers

Far right side of the text or picture missing on Dell 3100cn.

Refer to the following table
How common*
Contamination in the laser path
1. Clean the laser path. (Remove the laser/scanner assembly and clean the lens.) 2. Replace the laser/scanner assembly
Defective fuser.
Replace the fuser assembly
Lack of toner or faulty toner cartridge.
Redistribute the toner in the toner cartridge. If the problem continues, replace the toner cartridge.

Sep 30, 2009 | Dell 3100cn Laser Printer

1 Answer

An inch wide streak appears on the right side of a laser printer printed page.

If you can rub the toner off the paper it is the fuser.

fuser, the part of a laser printer that melts the toner onto the
medium. It consists of a hot roller and a back-up roller. After toner
is transferred to the paper, the fuser applies heat and pressure to
ensure that the toner stays on the paper permanently. This is why
paper is warm when it comes out of a laser printer.

For toner problem:

Do a half test as follows -
Print one sheet from the fold down tray, just as the trailing edge of the paper
goes into the printer open the toner door to stop the printer. Remove the toner
cartridge, are the marks on the paper that you can see in the printer? If they
are there the cartridge needs replacing.

Jun 03, 2008 | GCC Technologies Elite 12/600 Laser...

1 Answer

HP 4100DTN

Run a half test. Start printing a few pages, as it prints open the cover, remove the toner and look down at the paper. Does it have lines on the right side? If yes - replace the toner cartridge.

May 06, 2008 | HP LaserJet 4100dtn 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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