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

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Printing yellow for black

Hi, ran the self test diagnostic, and everything looks good. Printhead status are good. underneath, where it lists refilled supply, it says

detected in printhead black yes/yellow no magenta no/cyan no
detected in printer black yes/yellow no magenta no/cyan no

When trying to print black text, half the time it prints black fine, the the rest is either intermittent yellow and black combined, or just yellow.

All ink cartridges are new....mag/cyan printhead is original, black/yellow printhead was purchased in Jan, and has worked fine until now.
PLEASE HELP!

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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

Posted on May 28, 2009

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