Question about HP LaserJet 4 plus Printer

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HP LaserJet 4 printing vertical lines all down and across page

Hi, my old workhorse HPLaserJet 4...not a plus, just a laserjet, is printing ....even when pages should be blank....long vertical lines on every page, These are wide enough to be called bars, and they extend from top of page to bottom, also outside normal printing area....Help! Is my old friend mortally ill? I reloaded the HP driver from the HP site. cmb in Alabama....thanks for your help

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Sounds like your fuser assembly needs to be repaired. you can get the parts online fot about $40USD.

Posted on Mar 29, 2008

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  • 152 Answers

Your toner drum coating eject
change toner drum

Posted on Feb 26, 2008

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1 Answer

Multifunction HPLASERJET 3015: when I start copying a document will always print a black vertical line on the right of the page


Advisable for users & tech guys: Lift document feeder unit clean "scan head" glass with glass cleaner, check..

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Hp laserjet printer is printing a large vertical


if the band is white, you may have a problem in your laser scanner assembly, if the band is black, you may have a problem in your fuser assembly

Mar 30, 2010 | HP LaserJet 1012 Printer

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Solid lines print across the paper


It is usually caused by the drum. The lines are vertical? perhaps the drum was scratched and needs to be replaced.

If you replaced the toner before the lines appears, the printer needs to be cleaned.

Nov 02, 2009 | HP LaserJet 4 plus Printer

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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

1 Answer

HP Laserjet 3330 printed dark page especially around the middle


Does this happen both when copying and printing?
For printing solution, try another toner cartridge.
If lines continue to appear when copying (primarily through the automatic feeder) then lift the auto feeder, and clean the glass -mainly the narrow piece on the left side.

please rate solution :)

Apr 07, 2009 | HP LaserJet 3330 All-In-One Printer

2 Answers

Lines across printed pages


I think you need a new cartridge.

Oct 24, 2008 | HP LaserJet 4 plus Printer

1 Answer

Only first page prints out with HP LaserJet 4 plus


i would say reinstall the driver, wouldnt be a schoolboys trick even sometimes the schoolboys know more than the teachers when it comes to technology.

Try the machines with a seporate machine thats a freash install and see it does the same thing, this a driver issue, and sometimes the students can hack into the machine and asking the printer to just print just one page of the document, you can select pages in a print box in word / Internet explorer for example.

And you can ask the printer to print two pages onto one page.

Oct 22, 2008 | HP LaserJet 4 plus Printer

1 Answer

The lcd screen on our HP Laserjet 4 printer is barely readable. Is there something inside the printer that we can replace? We cannot locate a manual for this printer. Other than that, it is a virtual...


My first thought is probably what you've already considered as well...the LCD display is old and the functional elements are wearing out. My second thought was that it would probably be cheaper to replace than to repair. Nevertheless, I can try to address your question with a couple of ideas.

There are actually quite a number of "HP Laserjet 4" printers including the Laserjet 4, 4m, 4plus, 4m plus, and so on. Here's the list:

Product Search Results

Here's the webpage for the actual Laserjet 4:

Laserjet 4 Page

You should find a link to the manual for this product on that page. You can also ask a question directly on the HP support forums:

HP Laserjet Support Forums

Those options should give you your best bet on replacing the LCD if the option is reasonable or possible. Good luck.

Oct 07, 2008 | Printers & Copiers

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