Question about HP Business InkJet 2800 Printer

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HP 2800 inkjet magenta printhead/cartridge striping

At this point it almost apears as if there is no magenta being applied to the image at all. When the problem began there were only 1" to 2" sections where the problem ocurred and it seemed in those areas that the magenta was striping over the other colors, but not in the complete amount needed to get the image correct, and the rest of the image seemed fine, but now the entire image seems to lack magenta. I have changed cartridges twice and cleaned the output area of the cartridge, as well as run all of the alignment pages in the maintenace of the machine.

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This is for any printer that uses the 10/11 separate cartridge and head system, such as bi2230/2280, bi2300, bi2800, cp1700, etc.

Remove the heads (not cartridges) one at a time and do this to each one to clear/clean the jet nozzles:

Put about 1/8 - 1/4 inch of distilled water in a small bowl.
Microwave it to get it really hot, but not boiling.
Put the inkjet part of the head down in the hot water, only the jets, not the electrical contacts.
Let it set, then swish it around gently.
Repeat until you see ink flowing fairly freely from the jets.
If the water gets cool, throw it out, heat the fresh water and continue.
When you think it's done, use a clean disposable cloth or good quality paper towel to GENTLY pat the water off the jet area.
Do not wipe the jets. Pat gently.
With a clean area of the cloth, gently wipe the electrical contacts clean and dry.
Dry any remaining water from the rest of the head.
Do NOT touch the jet area or the electrical contacts.
Keep them clean.
Reinstall head.
Change water and do the next head until all are done.

If you pull all the heads at the same time, make sure you get them back in the correct slot.

If your heads are just clogged from lack of use, this should fix them.
If the heads have been used a lot, this trick will get a little more use out of them. In this case, you can do this once or twice, and then they will probably be worn out to the point of needing replacement.

And, of course, be sure to check your cartridges to make sure the cartridges still have ink.

Posted on Jul 20, 2009

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I had the same issue with this printer. What worked for me was replacing the printhead for each color having the issue. In my case all of the printheads went bad at around the same time. Replacing all of them made the printer perform like new. Here is the part number for the magenta print head: HP C4812A.

Posted on Jun 23, 2009


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1 Answer

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It sounds like the printheads are dirty or you have a leaking cartridge. Take the printheads out and clean them with a damp cloth. Just in case you haven't done it yet, do the printhead cleaning procedure. Also try temporarily lowering the print quality and see if the symptom changes.

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Sounds like one or more of your printheads is worn out. They are designed to be user replaceable, and wear out after a certain amount of usage.

Black is obvious, but if the lines are purplish, your yellow head is bad. If they're greenish, your magenta head is bad. If they're reddish, your cyan head is bad.

Vertical lines are very unusual. Can you scan a printout and post it somewhere that we can look at it?

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Good chance that you may have replaced the ink cartridge, not the magenta PRINTHEAD which sits under the ink cartridge.

PS - in my experience, non-HP ink cartridges clog up HP printers with separate printhead mechanisms... any possibility here?

Good luck!

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This can happen for very old cartridges, even if they still have ink. The cartridges have a shelf life and can lose colors (usual yellow and cyan first) if stored for years.

If this is an original HP cartridge check the cartridge warranty date as shown here. If the cartridges are within their two year warranty call HP at 1-800-HPINVENt or contact your dealer for replacements. If the cartridges are beyond their warranty period then purchase a fresh cartridge.

When buying new cartridges look for the "install by" date on the package. I would look for a package with at least six months remaining before the "install by" date, which would have a year of remaining warranty.

When storing unused cartridges for an extended period keep them in a cool place and keep them upright as they would hang on a store display. This will provide maximum shelf life.

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I am sure that a fresh cartridge will solve your problem.

Bob Headrick, MS MVP Printing/Imaging

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