Question about HP Officejet Pro L7780 All-In-One InkJet Printer

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HP OfficeJet Pro L7780 won't recognize new black ink cartridge. It keeps telling me to replace it. I have re-booted the printer several times.

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The following printhead has a problem black/yellow the printer will not print. These are new ink cartiladge


Hello and welcome to FixYa!
In the HP OfficeJet Pro L7780 the printheads are actually separate from the ink cartridges. In your case, it sounds like the black/yellow head has worn out and will need to be replaced. The good news is, this is a user replaceable part. The bad news is, the replacement heads are not cheap. Amazon has the HP 88 Black/Yellow printhead listed currently for about $61.
http://www.amazon.com/HP-Yellow-Officejet-Printhead-Packaging/dp/B000BO9L8M/ref=dp_cp_ob_e_title_0
YouTube has a nice video that explains how to install the printheads here:
http://www.youtube.com/watch?v=8Zl0LUxBSvg
I hope this helps!

Mar 02, 2011 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

Bought in Nov 2007 online from circuit City. Has


Change printheads,Issue will not get fixed then its a hardware failure.

Jul 11, 2010 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

Officejet Pro L7780 All-In-One InkJet Printer: the paper keeps getting caught underneath the ink ...


Hi,

Perform the steps given in the web link and check.

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00839319&tmp_task=solveCategory&lc=en&dlc=en&cc=us&product=2512010

May 18, 2010 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

HP Officejet Pro L7780 has stopped printing in black after changing yellow cartridge. Black is barely showing in spots. Have cleaned the heads and restarted twice and black cartridge is almost new, at...


I have to ask this question of you, just to make sure this is not an issue. Are you using a factory new ink or toner cartridge?
Please consider the following:
If you are using a refilled or third party cartridges that may well be your problem. Most manufacturers build logic into their products to prevent the use of “Other Equipment Manufactured” cartridges as well as re-filled cartridges.
They do this to prevent problems from contaminated inks or toner causing problems with print quality or damaging the physical printhead or photo conductors.
If you are using factory new ink or toner cartridges, then please call the manufacturer’s Technical Support for assistance with the warranty on the cartridges
Don

Feb 18, 2010 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

Won't recognize black cartridge on hp officejet pro l7780


Ok what you need to do is powerdown the printer the pull all ink out of the printer power it on without in then power it down again and replace the cartridges. If this doesnt work go into the control panels and select the color of the ink as only B&W and print a test page

Oct 18, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

HP Problem Printing Black


Try to reinstall your printer.

Check your black cartridge if they are installed properly.

Replace your black cartridge with a new one.

Aug 17, 2009 | HP Officejet Pro L7680 All-In-One Printer

1 Answer

Generic black ink cartridge causing black ink to not print


Never mix dye and pigment inks/machines Head could be screwed Try copying many black text only pages up to 200 but run head clean after 50 or so Inkypete

Apr 20, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

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