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

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Hp l7780 all in one

Just replaced my color cartridges, printer shows them full. Magenta does not print

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  • lferry Dec 19, 2008

    Hi I have the same problem only with the black!! Help!!

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I just purchased a hp officejet pro L7780 all in one wireless trying to set up system - was suppose to have a poster sheet to guide me -- NO GUIDE POSTER - can i view one on line somewhere at no cost -

Posted on Nov 23, 2008

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chk original cartridges installed? or refilled cartridges?
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I JUST NEED ORDER NUMBERS FOR ALL THE COLOR LASERJET CARTRIDGES FOR CP4525 PLS. THANKS,


You can find the user's guide here which lists all the parts and supplies. Here's the cartridge information from the manual:
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My boss want to replace the black ink cartridge for one that prints color. Can this be done with the HP 12-a cartridges? HP Laser jet 1022


Unfortunately laser printers don't work this way. The laserjet 1022 was designed for black and white prints only. In order to do color printing with a laser printer you will need to purchase one that is designed to print in color. The laser printers work a bit differently than the inkjets - the laser printers have 4 toner cartridges, one each for Cyan, Magenta, Yellow, and Black, that work together to print a full color page. With the old inkjets you could just replace a black cartridge with a color one.

So, short answer: Sorry but no you can't make a laserjet 1022 print in color. :)

I would recommend looking at an entry level color laser printer from hp, such as the CP2025 (http://h10010.www1.hp.com/wwpc/us/en/sm/WF25a/18972-18972-3328060-15077-236268-3673580.html) if you are looking into purchasing a color laserjet.

Hope this helps

Please rate this post, thanks!

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We use HP Color Laserjet CM1017; Magenta color is not printing


Dirty laser unit - needs (careful) cleaning internally.

See ' Printing Weak Magenta', 'Printing Light Magenta' for HP CM1015, HP Color Laserjet 1600, 2600, 2605.

All the same laser unit

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Insert HP color inkjet print cartridge 99 into HP OfficeJet 7410 I am replacing the HP 97 color print cartridge with th 99 print cartridge (both are color). The 99 will not go in all the way. I notice the...


The HP 99 cartridge is used if you would like to print photos. The HP 99 replaces the HP 96 (black) cartridge in your printer. The HP 99 cartridge has black, photo magenta, and photo cyan inks in it. When you pair this with the cyan, magenta, and yellow in your HP 97 (color) cartridge you have the full set of photo colors represented.

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My cyan cartridge shows as empty. My black


No. You need all the cartridges installed with functioning chips for your printer to work. The reason why you need all the colors when all you print is black is because a small amount of color prints when you print black. The manufacturers want to make up their R&D costs on the printers by selling lots of expensive ink.

Nov 25, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

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HP put chips in there cartridges to stop you from interchanging cartridges from printer to printer.

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The lt magenta and magenta just quit printing between pages


1. Check if the cartriges are correctly installed:
Installing the Ink Cartridges

2. Print a diagnostic page and clean print heads, using the printer cleaning utility:
Color Mix or Missing Colors on the Diagnostic Page
Repeat if needed.

3. If this still doesn´t solve you problem, try resetting the printer and manually cleaning the cartrigdes as advised in this FAQ:
Ink Cartridge is Missing, Incorrectly Installed, or Not Intended for Your Device' Error Message is Displayed on the Printer

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