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

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Print in black ink only

Can I set up my L7780 to print everything in black ink only?

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Yes, to do that ...

Right Click on the Printer you normally print too.
Click on properties
Click on Printing Preferences
Click on the Color tab
Click on Print in Gray Scale
Click on Black Print Cart Only
Click apply

That's it...


Posted on Aug 02, 2008

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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.

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Alignment failed refer to device documentation hp L7780


You need to remove the black/yellow printhead and dab it on a damp paper towel until you see a solid line of black ink on the towel when you press it. It won't pass the alignment until all colors work properly.

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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

Black ink problem with printout on hp7780


Always try replacing the ink cartridges first.

It sounds like the print heads in the 7780 are bad. Don't confuse the ink cartridges with print heads. The cartridges fit inside the print heads. You will need to change the heads. Here is a link to HP's how-to.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00841890&tmp_track_link=ot_faqs/top_issues/en_us/c00841890/loc:1&lc=en&dlc=en&cc=us&lang=en&product=2512010

Could have the same problem with the Dell.

Jun 01, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

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

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2 Answers

My printer won't print black or color ink. It makes a very loud sound and tells me that that it can't read my ink. I went to Office Depot and got new ink and no luck. Serial Number: HCFA98132 Model...


I brought a new Printer 1560 I have completed all the steps of formality but It does not print It spell out blank paper pls. shoot my problem as soon as possible.

Jul 27, 2008 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

HP L7780


Clogged Inkjets? Could they be white Lines in your prints? Assuming your inkjet printer worked OK before a period of non use? And you do not have any strange flashing lights, or an obvious electrical fault or malfunction?

Then most about 98% are more likely to be an ink clog which just needs to be unclogged using something like WARMED Magic Inkjet Flush
Basically, if a print head has been left unused for some time... moisture inside the ink begins to evaporate and instead of liquid ink, a thick inky jelly begins to form inside the print head.

When this occurs white lines appear in prints and most people not realising the problem, will replace their inks... But when that does not work. Some assume they have an electrical fault, and replace their print head, others will replace their printer !

But provided there is no obvious print head damage? In 98% of cases it simply needs a little patience and WARMED Magic Inkjet Flush injecting directly into the print head to dissolve the dried ink trapped inside. This will dissolve the clog and allow your expensive ink to flow once again. Most will then print as new.

Hope this helps to explain.

Apr 29, 2008 | HP Officejet Pro L7780 All-In-One InkJet...

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