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I am having continual problems with black printheads for the HP K550. I am on my third replacement from HP and the black ink still will not print. Ink doesn't even flow out of the new printheads when cleaned manually.

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  • wascally2004 Sep 13, 2008

    All the firmware upgrades have been made. This is a K550 and being used as a network printer. The operating system is XP on one of the computers and Vista on the other computer. The printer does not work from either location.

  • wascally2004 Sep 14, 2008

    The printer has a network cable. When I first got the printer it worked fine until the printhead went bad. None of the three "free" warranged replacement printheads have received from HP over the past 45 days has worked in the printer for more than 20-30 pages. When I do the manual printhead cleaning process very little or no ink flows from the black side of the blk/yel printhead.

  • yogesh02 Apr 10, 2009

    problem of continous calibration in hp lj 3600n

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I have had this happen a couple of times and have cured it easily. It has only happened with the black with me. It seems to be caused by air in the ink feed line. With the printer switched on open the top cover and hold the resume button for 5 seconds. The printheads should move to the left and you may be able to see air in the pipe(s). Remove the printhead of the offending colour(s) then insert a syringe with the plunger fully down into the rubber that the printhead connects to. Draw up the syringe plunger to draw ink/air through until you can see no more air in the pipe. Replace the printhead and close the cover. The printer should now do a calibration with the offending colour hopefully now working.

Posted on Mar 29, 2009

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Do you have the K550dtn or K550dtwn versions or just the K550? You can normally find this on the back of the printer on a nameplate.

And, what operating system are you using?

Thanks.

Regards,
Worldvet

Posted on Sep 12, 2008

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  • Glenn Rogers
    Glenn Rogers Sep 12, 2008

    Hi,

    Do you know if the firmware upgrade as been applied to your printer or not? If you do not know what a firmware upgrade is tell me that too using the comment box below.


  • Glenn Rogers
    Glenn Rogers Sep 13, 2008

    Alright, you have the dtn version then.

    WV


  • Glenn Rogers
    Glenn Rogers Sep 13, 2008

    Please verify the model number and version from the sticker on the back or on the bottom of your printer and not rely on what is labeled on the front. This is important as there are different drivers for the different versions.

    Since you stated you printer is networked, do you have a network cable connected to the printer? Or, are you applying a Share to the printer in your PC?

    The dtn has a built in network card and a socket for a network cable.
    The dtwn is wirelessly networked.

    Thanks in Advance,
    Worldvet


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  5. Buy another printer
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13,000 copies - that's awesome! although you've surely fixed this problem by now, for future refs or someone else searching for an answer... you might find this ref hp support helpful. happy printing!

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00458018&lc=en&dlc=en&cc=us&lang=en&rule=35557&product=501369

Step 4: Clean the printheads
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b. If there are defects on the page, click Level 2 Clean . 5. Examine the page that prints for print defects.
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