Question about HP LaserJet 1012 Printer

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Vertical black line down right side

I love this printer but now it is leaving a black vertical line - not too dark - down the right side of the page. I have tried a new cartridge and it is still doing it. Any ideas?


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  • maxsmom Mar 06, 2008

    Thanks! I can only open the top of the printer and can't get into the back of it, but from what I can see there is nothing anywhere. No reprinting either. It is possible to get two damaged cartridges?

  • maxsmom Mar 07, 2008

    Thanks so much! I just checked the fusion roller. It looks perfect. No creases or anything. Anything else it could be? Thanks again!

  • maxsmom Mar 07, 2008

    How would I go about cleaning the roller and/or the laser?

  • Anonymous Mar 10, 2008

    smudging on paper

  • Anonymous Mar 18, 2008

    Have heavy black verticle lines going down the page on both sides of the paper but not in the middle. Already tried cleaning rollers but problem keeps coming back.

  • Mecca1305 Mar 20, 2008

    I'm also having the same problem whenever a picture is present. The printer is shared, the other computer can print fine, but the other has a vertical line down the right side whenever a picture is present. It seems to be a conflict with the driver and something else. I have tried to install a new driver and the problem still continues.

  • Streamliner Apr 08, 2008

    A couple weeks ago my HP1012 Laser started making a funny noise like crackling paper, but printed normally. Today it started printing a dark line down the right side, most of the time when I'm printing on a printed copy already, I put page numbers on black on white maps and I notice it all the time on the map pages, but sometimes it's ok on white pages. I opened it up and took out the cartridge and looked in with a flashlight and found small pieces of looked like charred paper or plastic. I sucked that all out but it didn't fix the problem. I hate to try a new cartridge, if the printer is shot, I can't return a used cartridge. Streamliner

  • milmom Aug 27, 2008

    My HP 1012 started making a noise resembling crinkling paper, and ever since I have gotten a smudge of toner on the right 1 1/4" of each page printed. I found irregularly shaped plastic film-like pieces (most smaller than 1/2" square) which were black on one side and taupe on the other. I used a vacuum and canned air to try to clean out the printer. I can see small bits of toner(?) on the right side of the drum, but I can't get to them. I still have the problem, and am hesitant to replace the toner since I don't think the cartridge is the problem. Is there a way to clean the printer?

  • Anonymous Mar 20, 2014

    red lines down page



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What it is, is the roller in the back of the printer wears out and gets thin and eventually tears. I havent found a way to replace it yet but when I do I will let you know. A good replacement for it is the P1006 made by HP it is just the upgraded model and works just as good

Posted on Oct 09, 2008

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Did you carefully inspect all through the paper path for some fuzz, or a small piece of paper smearing the print?
The other issue would be the fuser. Do you see any reprinting of images or letters in that area?
What you can do is set the machine to print 2 or more pages and open a cover or turn off the power to jam the prints in the machine. See if the line is on the drum or not. If not then you have a fuser roller issue which would require replacing the fuser.

Posted on Mar 06, 2008

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  • Rick Kasper Mar 07, 2008

    Sorry not to be answering you sooner. My son had my laptop doing homework last night.
    Anyhow. It can be a defective new cartridge yes. But in your case I do not suspect that since reading your problem, it seems, at least the way I read it, is that the problem remains the same with the new cartridge. If the line has moved, then yes you could have a bad cartridge, but I am going on the assumption that its in the same spot.
    I really suspect you have a bad spot of teflon on the the fuser roller.
    If there was something in the laser path, it should cause a blank area, there is a roller in a laser printer, a black sort of foam like roller that may have a crease in it causing a problem.
    Let me know.

  • Rick Kasper Mar 07, 2008

    The last 2 things I can think of is a dirty laser or a piece of fuzz between the lasr and the drum, just slightly blocking the laser light path and creating that line. If it is in the same area where it was before you replaced the cartridge then that would be my last idea without seeing it.

    The other problem would be with a roller having picked up some ink and making that mark until its clean.

    With I had been more helpful. But without looking at the image and the machine , I am out of ideas.

  • Rick Kasper Mar 07, 2008

    The rollers, just open your machine and locate all the rollers visually, Dampen a cloth wih some alcohol and wipe them.

    The laser would be lined up with the drum, you would see an opening about 1/4 inch wide and maybe 4 or 5 inches wide. Most likely is has a shutter cover on the lens. You would just wipe that with a soft lint free cloth.



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My HL2040 printer is printing black vertical lines along the right-hand side of the page, about 3" or so. A month ago I took it apart and cleaned the roller. Still doing it.

If the lines go all the way down the page, check the position of the corona wire cleaner tab (blue or green) at the top front of the drum unit. if not parked fully to one side it will create a solid black lines where it blocks the laser. Otherwise look for some other foreign object (or torn paper piece) that may be blocking the laser from the drum. If the lines are thin and shark, check for scratches on the drum (not repairable without replacing drum). If the lines are uneven thickness but in a pattern that repeats down the page every few inches, then the film on the drum is probably worn or wearing away and the drum needs to be replaced.

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Printing not dark enough or varied in darkness
If the print is a dismal gray rather than a sharp black, you are probably almost out of toner. This can manifest itself evenly across the entire page or in splotches or stripes, depending on the printer.

Sometimes you can wring a little bit more out of a toner cartridge by taking it out and gently shaking it from side to side (never up and down, as toner can spill out). You can also try turning up the printer’s contrast adjustment, if it has such a knob (usually on the back side if it exists). Faded print can also result from a dirty corona wire, because a dirty wire inhibits a full electrical charge from being passed.

If the printouts are consistently varied in density, and you have to frequently remove the toner cartridge and shake it to redistribute the toner inside it, make sure the printer is sitting on an even, flat surface.

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A horizontal black line on the printout is probably the result of a dirty or damaged roller. There are lots of rollers in the printer, and you can use the space between the lines on the page to determine which roller is causing the problem. Measure the distance between the errant black lines on the page and then use Table A to determine which part might be causing the problem. Table A
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If there are evenly spaced black spots but they don’t extend all the way across the page, the problem is probably a scratch or flaw in the drum or a build-up of toner on the fusing roller. If the spots are less than three inches apart vertically, it’s probably the drum, because the drum has a larger diameter than the fusing roller.

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Dark lines appear on each page I print on the printer. I have cleaned every roller, dumped the old toner and added new toner.

Are the lines vertical or horizontal?

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