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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Posted on Jan 02, 2017

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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.

Regards,
Bob Headrick, MS MVP Printing/Imaging

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