Question about HP Officejet Pro L7680 All-In-One Printer

2 Answers

The following printheads has a problem

I put new printheads in and all it says is this, the following printheads has a problem. black/yellow [K/Y] magenta/cyan [M/C]. Cleaned metal contacts still says same thing. It will not let me do anything.

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  • Anonymous Aug 06, 2008

    My printer tells me there is a problem with the printhead even after manually cleaning, relacing the cartridge.It is now completely locked up and will not do anything at all. I cant run any diagnostic tests or anything else i know to start to fix it and the warranty was up in march?!?!?

  • Colleen40 Aug 06, 2008

    So annoying. Cleaned & replaced KY printhead and it worked for about 20 - 40 pages and then quit. It is now in a locked state saying the following printhead(s) has a problem black/yellow KY.

  • Shorea Aug 13, 2008

    Same exact thing as all of you and same exact message....

  • Anonymous Aug 13, 2008

    Same problem



  • jcleary Aug 19, 2008

    same problem, same message, same locked state

  • Rsim780194 Aug 22, 2008

    I am having the same porblem Black/yellow {K/Y] printerhead has a problem. Any solutions?

  • Anonymous Oct 19, 2008

    Same problem with printheads on 2 printers help!!

  • Anonymous Nov 19, 2008

    Same problem, this is my 4th all in one

    printer with the same problem.

  • waseem3000 Nov 23, 2008

    Same issue and I tried cleaning the head contacts and resetting but nothing in vain. I did nothing wrong and bought original cartridges etc. I will definitely RMA this machine.

  • Anonymous Apr 15, 2009

    I have an Officejet L7780 with the same issues "printhead problem black/yellow k/y"

    I called HP, I'm still under warranty told them the issue. This is the 3rd time..



    End result: waiting on a replacement from HP... 3 days shipping. I'll keep you posted

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Resetting the All-in-One

  • Press the On (the following printheads has a problem - fa37665.gif) button to turn off the unit.
  • Disconnect the power cord from the back of the unit.
  • Connect the power cord to the back of the unit.
  • Press the On (a477fdf.gif) button to turn on the unit.

Posted on Aug 19, 2008

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I read all the blogs and forums regarding this issue. There are lots of comments. My Officejet Pro L7555 from Costco had run flawlessly for 4,000+ copies. I replaced various inkjet cartridges along the way but never had any trouble with the printheads. Then one day I got the "The following printheads has a problem...black/yellow. Took out the printhead and cleaned the contacts(several times) as recommended and then started to get the same message for both printheads...black/yellow & cyan/magenta. Tried all the power reset suggestions and was about to order new printheads when I tried a new twist on a combination I had seen in some previous blogs/forums. THE SOLUTION THAT WORKED FOR ME: With power ON, unplugged the power cord for about 15 mins, then plugged it back in while holding the"#" & "6" keys on the front panel of the printer. Came on and went through a long cycle(5 mins) that included printing a couple of pages I had never seen before. Think they were alignment pages. Everything seemed to work fine now. Not sure what the "#" & "6" sequence did but also had seen a reference to using "#" & "7" instead. I think it is a partial reset but whatever, it solved my problem and saved me $120+ I would have spent buying new print heads. Hope this will help someone else.

Posted on May 27, 2013

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Magenta and cyan will not print on my hp officejet pro L7590 -- it started with a paper jam that was corrected - ever since then only the yellow and black will print on the paper -- printheads are good and...


Same thing happened to my printer hp L7590. Printed diagnostic, only black and yellow printed; diagnostic for printhead health Ky=good, MC= good. Only Hp products ever used. Uplugged, & discharged static, cleaned copper parts of printhead. Still no fix. On visual examination of floor of printhead compartment rectangular pad ( approx 1/4" by 1/2") is missing. I can only guess that during the paper jam, somehow the pad got caught up and went awol. Not sure what to do now.

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Unfortunately, it sounds like you need a new printhead C9381A. You can hope that it's clogged from lack of use and go into printer properties and attempt to clean it (it will use a lot of ink in the process). However, the the black/yellow printhead generally wears out faster than the C9382A cyan/magenta printhead. Replacement should cost around $70 for each.

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HP Officejet K850 pro prints black ok, but colors are poor


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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.

I hope it's not a short term fix...I developed the problem when I didn't print for a long time, hope this helps someone, Cyn

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Printing yellow for black


Hi Jan,

Can you confirm that you are using a CIS or non-HP cartridges with this printer?

It sounds a lot like the printhead has reached a clogging point where sediment has built up in the black portion and loosens enough to printer a few lines before it re-asserts itself again.

Based on my experience of this printer, if you're using a non-HP delivery system for ink then you should consider replacing the black ink with a dyebase alternative instead of pigment.. Replacing the Black/Yellow printhead and running a number of test prints to purge the pigment ink in the printhead should then result in a clean and more reliable printout in future.

One other vector for problems is the cleaning area and I've found that this can become soiled with excess ink causing cross contamination within the inks of one printhead. As yet I've not found a reliable solution to counter this sort of issue.

Hope this gives some clues and hopefully some ideas of a fix.

Martin

May 24, 2009 | HP Officejet Pro L7680 All-In-One Printer

1 Answer

Changing the printhead


FYI: The L7590 doesn't have any tape on either the cartridge or the printhead.

Right couple of things here...

1. The printheads in the L7590 are either K/Y (black/yellow) or C/M (cyan/magenta)... There's no single black printhead unless of course this is not an L7590 we're discussing here.

2. The cartridges ARE individual with K, Y M C (Black, Yellow, Magenta and Cyan).


It's likely that the printer has one of the following faults.
  • Chip contacts and/or chips on the cartridges are soiled and/or damaged. Try checking for ink on chips and contacts in the cartridge bay

  • The little white oval pump in the bottom of the cartridge bay has become disconnect or broken. This is used by the printer to pump ink into the printhead but it also detects pressure variations and has a logic circuit which declares low pressure as "no ink".

If the problem is the latter then you need to get the printer serviced and/or repaired at a service center.

If it's the former you should be able to fix it yourself.

If you're using non OEM (ie: not by HP) cartridges I'd recommend getting a new OEM/HP one to test before you go for a service as some cartridges are just poorly filled and/or designed.

Hope that helps.

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Replace the Black and Yellow Print Catridges. The print heads are mounted to the bottom of the catridges and these, depending on whther they're from HP or not. can have a hard time conducting electricity properly, and in turn.. spitting ink out properly.


Also happens often with aftermarket Catridges because HP puts chips on the catridge. be sure to put an HP catridge. Sometimes you get what you pay for :)

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