Question about Canon PIXMA MP780 All-In-One InkJet Printer

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Magenta blocked on canon mp780

If the magenta is blocked, how do you fix that. Should I just put in another cartridge?

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  • dmdavis5 Nov 30, 2008

    Magenta is blocked. Does not print red. Also, from deep cleaning I get the message Waste Ink Nearly Full. Now what?



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Take out the cartrige and wipe the printhead down with a damp cloth and the color should bleed onto the cloth

Posted on Jul 29, 2009

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1 Answer

Magenta not printing


Remove the magenta cartridge then re-install the yellow followed by the magenta

Mar 12, 2012 | Canon PIXMA MP780 All-In-One InkJet...

2 Answers

"wrong cartridge"- Printer is giving us a "wrong


Hi Sherri

I am having the same problem with my MP780 mine started doing the same thingafter deciding to use Calidad inks the large black ink leaked into the yellowink (stick to canon inks).

What I have done so far with no success -
Replaced the ink cartridges with new ones supplied by Calidad, still the sameproblem.
Removed and cleaned the print heads manually and to my surprize after soakingin warm water and multiple cleanings for over 1hr black ink is still coming outof the yellow ink head.
I still get the same message after all I have tried...

One thing I did manage to do is prime the yellow ink and got it flowing throughthe head again but it's still mixed with black... I wonder if you may have runout of magenta and dried the head...

Try priming the magenta ink by removing the head (don't touch or wet the metalcontacts at the rear, the ink heads are on the bottom) place on a clean lintfree cloth (or I just used damp tissues then dry tissues) you should get onelong black strip and two cyan, two magenta and two yellow strips on the tissue,if you do not then try priming by replacing the magenta cartridge and gentlypumping the cartridge up and down repeat until you get the ink flowing.

Replace the head and cartridges, press ok, turn the printer off then reset.

Let me know if it works or if you come up with another solution that works as Iam still trying to figure out how to fix mine.

Good luck

Dec 21, 2010 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Canon Pixma MP780. Recently my color ink


Have you checked to see if the jet area on the bottom of the ink cartridge has a blackish sludge on them? It might be that the area that the print cartridges are purged/cleaned to one side of the printer (sometimes called a service station, or spitoon) has built up excess ink that has gotten thick and high enough that as the carriage goes over that area the bottom of the cartridge gets polluted with the blackish sludge. It will work slightly into the jets where the ink comes out and cause discoloration, even after you change the color cartridge. Open the unit to look inside with a flashlight for build ups and clean it (if you find some) with disposable things like cotton swabs, coffee stirrers, whatever you have that wont damage anything inside. Another cause could be mixing of the cyan and magenta and yellow somehow inside making a dark color representing black - but replacing the cartridge would cure it immediately.

Jun 19, 2010 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

MP780 printer doesn't show red color, I replaced a new Magenta color toner, but it didn't show any red color.


Go to printer maintenance and perform deep cleaning,do it for 3 times the if it doesn't clear the error, try to look for a chemical solution that can be use to unclogged printhead. Remove the printhead on the printer then soak it but don't dip the whole unit it might got wet the board of the printhead. You can also put some cleaning solution on your old cartridge without removing the printhead on the printer. You must put the solution of course on the magenta only. Let it there for 12 hours then perform a test.

Sep 23, 2009 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

New Ink Cartridges display low


yes it is not original you buy a new original one then show ink position

Jul 20, 2009 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Colours have suddenly become washed out and lime green.


I read a lot of complicated stuff about cleaning the print head after my similar problem this week. Finally I found an old, soft toothlbrush, gave it a very light spray with windex and lightly brushed the magenta print head. I put the cannon cartridge back in and everything is printing perfect again. This worked for me, good luck to l you.

Dec 08, 2008 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Prints all yellow, with some blue and black, no brown


the problem is very simple the magenta ink the cartridge is over or the head is been blocked from where the magenta ink comes out,
because red colour requires ---yellow plus magenta(pink)----to make it red.and ----dark yellow plus magenta(pink) -------- for brown colour.

Nov 22, 2008 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Color print quality


You can clean the head from the printer software or take it out and run some warm water over the ink ports/ink jets.

Are the ink tanks securely clicked in place? they can come loose easily

Jun 03, 2008 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Color problem


Chances are your othe cartridges were low...

When you install a new cartridge your printer does a head cleaning, and it uses alot of ink...

If the others were low, your printouts will show magenta as its the only color left...

Feb 10, 2008 | Canon PIXMA MP780 All-In-One InkJet...

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