Question about HP Officejet Pro K850 InkJet Printer

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I have a hp officejet k850. Intermittently the text is unclear.It has lines and dots through it. I have replaced the printheads and that did not solve the problem.

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  • Ihsaan Bulbulia Jun 17, 2009

    After looking closely at the print the intermittent problem I am having is the bottom part of the font is on the top of the line and the top part of the font is at the bottom.

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  • HP Master
  • 1,996 Answers

Have you tried using the print quality diagnostics to determine whether alignment or other tools may correct this problem? See link here. Also consider the possibility that the nozzles are clogging. See link here. If you have no luck with either of those remedies, you may consider the option discussed in this forum as a final resort...

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

Posted on Jun 16, 2009

  • efs_perpends
    efs_perpends Jun 17, 2009

    Did you try the diagnostics?

    See link here. Or search the HP support site here.

  • efs_perpends
    efs_perpends Jun 17, 2009

    check for updated drivers here.

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1 Answer

K850 printhead


How did you determine printhead problem. If not printing, try this.:
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from tools menu, clean and allign cartridges.
make this your default printer.
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So I trickled warm water over the cyan and yellow printheads....then thought what the heck, got a bowl of warm water and swished the printheads half submerged. They print perfect now I have the reds, yellows, greens and all the colors back w/ the clean printhead option and printed a coupon, it was perfect.

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1 Answer

I have an HP Officejet Pro 7580. When printing in


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Soon after I posted the problem on this site, I went to different margin setting windows and they all appeared correct. I tried another test page and noticed the printer was off. I turned it back on and it worked perfectly. I had previously unplugged the power and cable and rebooted the system several times to no avail. I also have an HP Officejet 7410 All-In-One so I didn't need the other for everyday operations, just preferred it.

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