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HP L7780 wont print in black. It prints in grey, I have replaced the print cartridges and the printhead is good

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Open solution center-->settings-->printer settings-->color tab, change the settings from there.

Posted on Oct 02, 2009

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Officejet pro l7780 not printing


OfficeJet 7880 Not Printing


A little more information would have been helpful in troubleshooting this problem. Did the printer ever work correctly? Did it just start printing yellow lines one day? Has it been out of use for a long time or, did you buy it in this condition. Also, is your computer a Windows PC or a Mac and which version of the OS are you using?


If you don\'t have the manual, you need to download one. I saw a link in a previous post or you can go to HP.com. The manual is crap as far as troubleshooting but it has all the part numbers of ink cartridges and printheads.


From the skimpy info you have supplied, I am going to assume there is something wrong in the ink supply system.


1. First you need to print a test page to find out if anything other than yellow can get to the paper. Find the HP Printer Utility. Again, not knowing what computer and OS you are using, I can\'t give you any explicit info. On Windows you might find something in Control Panels>Printer or under Programs you might find the HP Printer Utility. On a Mac maybe System Preferences>Printers or Go>Applications>HP Control Center.


2. If it only prints yellow boxes, or yellow boxes with streaks, you can run the Clean Printheads utility and reprint the test page. If you get more yellow or other colors start to show up, this indicates there\'s something wrong in the whole ink supply chain.


The HP 7xxx printers use the CYMK color system and have separate ink cartridges for each color: cyan, yellow, magenta, and black(K). In addition, the printheads are separate from the ink cartridges: yellow/black printhead and cyan/magenta printhead.


3. The problem could be in the ink cartridges or the printheads, or both. If the printer has been sitting for a long time, the ink will gel and clog up the whole system. Check the ink cartridges first. Are all four of them installed? Are they HP brand? Take them out one at a time, shake them and the reinstall them. Print another test page. Did anything change?


4. If more colors are printing, even with streaks, you should probably replace all the cartridges with GENUINE HP cartridges that are not expired. This could cost you $50-$60 on an eBay purchase but if you buy non-HP, or expired cartridges, you will not be a happy camper, long term. If you want to do this on the cheap, buy a black cartridge and see if you can at least start printing text. If you\'re making progress, you can buy the color cartridges later.


5. If replacing the cartridges fixed the problem, you\'re home relatively "free". If you have to replace either or both of the printheads, this can be expensive. They can run from $50-$100 each, so you\'ll have to make a decision on how much you want to spend on a printer that sold for $175 at Costco 6-7 years ago. Don\'t get me wrong, this is one of HP\'s better print engines but you will have to make an economic decision based on how much it\'s going to cost to bring this printer back to life. You can probably pick up a used 7xxx printer on Craigslist for $50-$75.


Hope this helps.

Sep 22, 2014 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

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

Printer is printing gray and not black


Hve you checked the level of your Black ink cartridge. Normally when it runs a little low the black comes out all faded and grey. If it is still resonably full then I suggest you give it a good clean.

Once this is done print a couple of test pages top see if there is any change.

Feb 10, 2011 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

I have an hp officejet 7110 all-in-one and I've been getting a message saying that supply expired on the black cartridge. i replace it and it still won't let me print. what else could be wrong


Hello there:
This problem is usually due to a print head that needs to be replaced
I have provided the information that you will need ok
best regards mike
This document provides information on how to replace a printhead or ink cartridge.A printhead may need replacing when print quality issues cannot be resolved by cleaning the printheads or a front-panel display message indicates a printhead needs to be replaced.An ink cartridge needs replacing when a front-panel display message indicates either:
  • Low ink levels
  • Ink cartridge approaching expiration date
CAUTION: Never remove an ink cartridge and a printhead at the same time. Use the table below to identify the correct ink cartridge part number: Ink cartridge Part number HP 14 black print cartridge C5011A HP 14 tri-color print cartridge C5010A Use the table below to identify the correct printhead part number: Printhead Part number HP 14 black printhead C4920A HP 14 cyan printhead C4921A HP 14 magenta printhead C4922A HP 14 yellow printhead C4923A Replacing the ink cartridges Follow the instructions below to replace the ink cartridges:
  1. Turn on the unit, and open the print-carriage access door by lifting the handle until the door locks into place. Figure 1: Opening the access doorc00064456.jpg
  2. The print carriage will move to the center of the unit.After the print carriage stops, remove the ink cartridge by pressing the gray release button, then lifting the cartridge up and out of its slot. Figure 2: Removing the ink cartridgec00064457.jpg
  3. Remove the new ink cartridge from its packaging and, being careful to touch only the black plastic, remove the tape. Figure 3: Removing the tapec00064458.jpg
  4. With the ink cartridge label face-up, push the new ink cartridge firmly down into the appropriate slot until it clicks into place.The color ink cartridge inserts into the right-hand slot as indicated by the rainbow colored oval. Figure 4: Inserting the new cartridgec00064459.jpg
  5. Close the print carriage access door. CAUTION: If the ink cartridge is removed before a replacement is available, close the print carriage access door and replace the ink cartridge within 24 hours.
Identifying parts of the printheads Use the table below to identify the parts:
  1. Printhead handle
  2. Printhead tower
  3. Copper contacts
  4. Plastic tape
  5. Ink nozzles
c00064460.jpg Do not touch:
  • Copper contacts
  • Ink nozzles
  • Printhead tower
c00064461.jpg

Jan 24, 2010 | HP OfficeJet 7110 All-In-One Thermal...

3 Answers

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.

Nov 19, 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

Apr 20, 2009 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

Printer won't print black ink


Hi,

The HP88 black cartridge contains is a pigment ink type which I've found from painful experience has just not been tested properly by HP for use with this printhead.

The problem will not be the cartridge but most likely the printhead which will have clogged due to heat, lack of humidity, etc..

The best solution I've found to date is to purchase a new printhead and find a 3rd party ink supplier with dyebase black ink instead of the pigment type. The printhead is much less likely to clog and can cope with a wider range of temperatures and environments compared to the original black.

I hasten to add this is based on my experience in four primary schools and from three printers at home all of which use the HP88 cartridge... Warm and dry environments just stop this printhead after a short period of time whereas cool, humid spaces seem to keep the printers working much longer.

Hope this helps.

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

3 Answers

Printhead Problems


Since buying the L7780 printer for our business office two years ago, the printer has been a work horse for us. The problems I've seen online about scanning, paper jams and ink cartridge issues have been none existent. Then it was time to change the print head. The L7780 printed several pages before the print head error message appeared and the printer ceased printing. We tried all the solutions offered online including another print head and cartridges but to no avail. We were ready to buy a new printer. Then a member our team whom we dubbed “Service Tech 130” came up with the solution. Service Tech 130 simply pried the chips off both print heads with a screw driver and super glued the old chip onto the new print head. Now the printer has been working as if nothing was every wrong.
For this to work for those of you having the same problem, you would have to be in possession of the old print head that worked prior to the error. Attached is an image showing the location of the chip. Hope this works for you as it did for us.9101d4c.gif

Apr 02, 2008 | HP Officejet Pro L7780 All-In-One InkJet...

4 Answers

Problem printing with HP Business inkjet 1200


I have a HP Business Inkjet 1220 Printer, and the block ink cartridge light is flashing. I replaced the cartridge with a brand new one, closed the door, and black ink light is still flashing. I put in another neew black ink cartridge, closed the door, and same issue- black cartidge ink light flashing. I cannot print- what to do?

Oct 28, 2007 | HP Business Inkjet 1200dtn Printer

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