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I have an HP OfficeJet Pro L7780 All-In-One. Following cleanin a paper jam I'm consistently receiving the message: "The following printhead has a problem - Magenta/Cyan" I've repeated tried to resit the printhead and to gently clean it with alchol, to no avail. I've has a similar problem in the past with another HP printer. I have an immediate need to get the printer up and running for my medical office. Prior to shelling out $70+, Iand to avoid any delay in the repair, was hoping to troubleshoot the problem with you.

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Posted on Sep 14, 2009

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White Lines HP Officejet Pro L7780


Have you replaced the ink? Perhaps one color is low or one of the pin-heads is broken. If the pins on the printer have broken you will need a repair technician or just buy a new printer.

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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

Paper Jam cleared but?


It sounds like the paper sensor in the paper try is broken or jamed. Remove the paper tray and locate the paper sensor. Check if it is jamed in the up position or if it is broken.

Jan 21, 2010 | HP Officejet Pro L7780 All-In-One InkJet...

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HP Officejet Pro L7800. Had paper jam, but opened


mine was 2 there was paper stuck in the little white gears

Nov 02, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

How do i clean the printheads on a hp officejet


hp printers have a utility program that cleans and purges the printer heads. Go to HP on your startup menu and look through the options....mine is located in the "hp solutions center".

It has an option for purging the printer heads.

Jul 07, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

Printhead Problem


Open the cover and hold the cancel button for a few seconds, the carriage moves to the left side. Pry off the cover on the right and look for any paper scraps down in the cavity. You can also remove the m/c printhead and wipe the bottom on a damp paper towel and try again...

Jul 02, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

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My HP Officejet Pro L7780 All-In-One InkJet Printer was jammed with paper. I believe I got it all out and now the display reads" Printhead problem- the following printhead has a problem: magenta/cyan...


There are two possibilities here Joanne, first, it could be a false error message or else second, the Cyan/Magenta print head has gone bad.Try the following:
1. Take the Cyan/Magenta printhead out. Remember, the printhead...not the cartridges.
Clean the copper contacts with a Q Tip, moistened with plain water. Wait till it dries, put the printhead back in.
2. If this does not resolve the issue, unplug the power cord from the back and press and hold the power cord for 30 sec. This will drain all the static charges. Plug it back after a couple of minutes and see if the error message re appears.

Jul 02, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

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