Question about HP LaserJet 9040n Printer

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Flaws at top of each page when printing

Our HP Laserjet 9040n is about a year old and has been marking each page when printing with marks at the top of each page ( always five sqiggle-like marks about 5mm grey markings) at consistant distant apart on everypage.  I have done a cleaning page and we have taken out the rollers and given them a wipe but nothing has changed. It is consistant and prints these marks on every print out whcih we make.


Please help- this is very annoying since I work in a design environment and we need 'clean' print offs.


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  • Joon Oct 19, 2007

    Thank you for the suggestion. I've done all of the above but still have the marks. the marks look like a squiggle ( all exactly the same mark in five consecutive places only at the top of the page) Looks like a up and down, arrow shaped marking).   



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Replace toner cartridge drum is scratched

(Possibly by staple going threw machine if that what each of the five marks look like, all those removed staples always seem to end up in printers)


You can pull it out (I think right top cover opens and cartridge pulls up and to the right)  then .. turn it over and gently pull back cover see drum has same marks as you see on paper, you can gently rotate drum by using gear on edge do not force it only turns easy one way, Do not touch drum surface very delicate and sensitive. Normal disposable item buy a New cartridge here is HP part number for your model  HP C8543X (HP 43X) Toner Cart.

Posted on Oct 19, 2007

  • Soulvisitor
    Soulvisitor Oct 19, 2007

    If you have already put in a new print cartridge then we need to eliminate the problem being a scratch on upper fuser roller.


    You can do this by purposefuly jaming the machine, with a little patience and timing, try to do a print and stop machine (open top cover)  when paper has passed the cartridge but not finished fusing, that means before hot bit on left end


    Remove cart and look at printed but not fused document, is mark present before fuser?


    Fuser roller wear is normal and can be fitted by yourself, life is meant to be 300 000 but 250000 is more true.


    You can remove fuser to inspect rollers left side door, remove duplex option if installed then two blue or green tabs down low inside left opening at front and back, fuser is hot be warned, pulls up and left.


    You might also want to try printing to face up tray instead of face down to see if turnaround guide is being nasty


    Does it do marks when using other trays and also the manual bypass?

  • Soulvisitor
    Soulvisitor Oct 19, 2007

    Also just thinking of your arrow description, check transfer roller guide plate for damage, thats under cart, a black rolller sits in base of machine running it's width, near roller from memory ther is a row of metal points that brush underside of paper to applie a charge, are they bent, dont touck roller with fingers, is also a common wear item, you can purchase a maintence kit for these that install easy with instructions that includes all feed rollers, transfer roller and fuser. Can get via hp or aftermarket suppliers think its a 350 000 Maintenence kit about 300 aus$



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