Question about Dell Inkjet 720 Printer

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My dell 720 is printing blank pagesa few days after i got the black cartridge refilled. I tried soaking it in hot water and run in the "clean nozzle application" and still nothing...any suggestions

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I had the same problem. I simply had to buy a new ink cartridge, even though it was showing up as having ink. Now it works great.

Posted on Feb 25, 2010

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If you had it professionally refilled,.. take the cartridge back to the place that did it have them do it properly for you. If you did the refill yourself,.. you may not have followed the procedure correctly or may have not filled the cartridge in time for the ink to not have dried inside the end of the cartridge (this happens when someone fills a cartridge that has been empty for a few to several days or more and does not store it correctly when it is pulled from service). When the ink dries inside the nozzles, it is definitely hard to resurrect the cartridge without using isopropyl alcohol (90% Technical for head cleaning and such) not the most common (Drug Store 70%). I have been successful in doing the following procedure on about 40% of the cartridges with the same issue you are having after refilling.
1) obtain a clean, non-metallic cup or container (with a lid) that is wide enough to set the cartridge into and deep enough to allow the cartridge to set all the way inside and be covered with a lid.
2) Pour 1/4" to 1/2" of 90% isopropyl alcohol into the cup.
3) Place the cartridge in the cup with the print head nozzles in the alcohol.
4 Let this sit in the alcohol with a cover on for 10 minutes,.. you will notice the alcohol dissolving the ink. This is good because the alcohol will dissolve the dried ink in the capillary tubes and electrostatic ink valves that are keeping the new ink from flowing.
5) Remove cartridge from cup and set the cartridge print head on a dry cellulose sponge for a few minutes. The sponge will have ink seeping into it,.. that is fine.
6) Place cartridge in printer and do 1-3 test pages. If the ink does not flow yet, repeat the procedure steps 3,4,5,and 6. If after the 4th cycle of repeating steps, the cartridge does not print, then it most likely needs to be tossed and replaced.
I hope this is helpful for you now and in the future
For future reference: Using water to do this,.. especially tap water will plug up the capillary tubes and electrostatic ink valves with mineral deposits and not dissolve the dried ink properly,... not to mention the water will not get up far enough, due to air in the water.

Posted on Feb 08, 2010


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1 Answer

There are no signs of error but the paper comes out blank

Hi Zanda
if you haven't used your printer for that long, your printhead is more than likely dried up and clogged. Try running the "Head cleaning" utility 2-3 then print a "Nozzle check" (find both of these functions on "Maintenance" page under "Printer properties".
If the nozzle check shows any print, you're on the right track. Run few more head cleans or try printing several pages (with LOT of colour) on high (best photo) quality. Combination of printing & nozzle checks works best. Be prepared to waste lot of ink doing this!

If you get no print at all, it's probably time to get a new printer. There are other things you can try eg. buy set of cleaning cartridges, try to clean the printhead by placing some folded tissue soaked with Windex under the printhead or forcing some Windex through the printhead pickup (using a syringe & rubber tubing fitted over the pickup needle - where the cartridge usually sits) etc.

Another way yet is to remove the printhead from printer and soak it in cleaning solution (if if you're handy and prepared to pull your printer apart).

good luck!



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Blue ink doesnt print ..yello balck,and magenta are fine .WHATS wrong ?

I recommend you.
1.- Remove the printheads
2.- clean the contacts in printhead and in the carriage cartrigde. Use a clean cloth
and reseat the printheads

In printr control panel enter to menu "maintenance"
Do a clean nozzle
If continue problem

Try a new cartrigde, you can buy on

Is important for people who share their knowledge, know your comments.
If the answer is helpful, rate my answers

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It won't print in black. We have tried 3 differant cartridges. At times it prints a shasding of the image. All the other colors work fine.

Use the HP Printing Assistant software to run a few "print-head-cleaning-cycles".
The BLACK ink-jets are CLOGGED. So, no ink from any of the 3 different cartridges reaches the paper.

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I have a Dell 720 printer; just changed the black ink cartridge, with a Dell cartridge. But won't print in black. Colour cartridge working Ok. Have cleaned nozzles, reset printer preferences, dipped...

It is possible that the cartridge that you bought is not working and it happens, I experience it myself. Since you have done most of the troubleshooting for printer cartridge issues, you may want to contact Dell technical support to have that cartridge replaced. They might ask you to do those steps again to validate the replacement.

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Black #16 wont print I just refilled cart. only prints in red

If your printer isn't rejecting the cartridge then it sounds like the print head is clogged. You can try to get it flowing again by rubbing/soaking the print head on a paper towel soaked with warm water. When it is flowing it should give a thick black line when pressed into a dry paper towel. You could also try running a nozzle cleaning cycle on your printer. The red you're seeing is the color that is added during black printing to make you use up your color cartridge when you aren't printing color. Fun fact huh?

Jan 22, 2010 | Lexmark Z600 InkJet Printer

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Repaced black cartridge & it won't print, Dell 720 printer

If you refilled the cartridge instead of buying a new one, than that is your problem. New printers won't accept refilled cartridges, you must purchase a new one.
Let me know if this helps, and please rate my answer. Good luck.

Jan 12, 2009 | Dell Inkjet 720 Printer

1 Answer

Blank paper new(ish) cartridges

They are clogged. Soak the print head in hot tap water for a few seconds, dry and re-insert. Then run the cleaning program. If this does not work, then you need new carts.


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My Canon won't clean its print heads


Have you tried power cycling the printer?

Feb 17, 2008 | Canon i860 InkJet Photo Printer

3 Answers


Your printer works with the BCI-3E (bk/cyan/magenta/yellow) cartridges, that are in fact just ink-tanks, the printhead being apart of the tanks, so if the cartridges are not empty, it cannot be because of them. It doesnt matter if you replace the cartridges, the problem is in the printhead. Curious thing is that usually it starts with pour quality printing if printhead starts to clogg, not with blank pages...

If the problem occured just a while ago, you should consider that NOT PRINTING a long time (30 days) with a printer can lead to ink drying out in the printhead, clogging the nozzles. But usually not entire, so that something is still printed, paper does not come out white.

Anyway, now it comes:
If you have some tehnical skills, you can remove the cartridge and desassembly the printhead (where the cartridge are in) and do the following:

First of all, look if there is somne ink lines on the nozzle part of the printhead. If you put a paper-tissue on the nozzles and it let on paper the 4 lines (black and colors) than maybe it's useless to clean the printhead, ink is comming trough and dont know why paper comes out blank.
If there are dry:
Put a paper-tissue on a small plate (like a coffee-cup plate), then put some boiling water on it, just 2~3mm of water over the tissue.
Put the printhead with the nozzles part downside on the tissue, in the hot water.
Let it stay there in the water 30 min.
Put the cartridges back on the printhead (without installing it in the printer), rap it in an other clean tissue, than shake it strongy as if you want to force ink to get out trough the nozzles. Then clean gentle the nozzle part of the printhead on some sheets of tissue.
Get the cartridges again out of the printhead, install it in the printer, then install the cartridges again and run a few cleaning processes from the printers maintenance software.

It should work. If you dont have the tehnicall skills needed, Canon gotcha, or you can visit a local specialist to make all this for you, they usualy have better equipmens, as ultrasonic cleaners and special solvents that makes all this easyer.

If after that still dont work, it's bad, it's not from cartridges or printhead, it's something else... Dont know what, from a distance.

Rate the solution if it helped you!


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