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

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The e3 black does not print. How do I get it to

On my PIXMA MP780 the e3 black does not print. How do I get it to work? I have pulled the print head, rinsed it with warm water, soaked it in 91% isopropyl alcohol over night, and rinsed again with warm water. Air dried it. I put windex on the cleaning pads. I ran several cleaning cycles and test paterns. I do not know what next to do. How do I fix this issue???

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  • 74 Answers

Try to clean out the stupid printer ink slot

Posted on Jul 22, 2009

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Posted on Jan 02, 2017

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2 Answers

My PIXMA 780 has been standing for a while. It will now not print from the 3e BK cartidge. When I print a test page there is no output from this cartidge at all, ie no black prints at all. Colours work...


After setting for a while it is possible the print head is completely clogged with dried ink so bad that even deep cleaning won't help.
You can manually clean the print head by raising the lever and Remove all the cartridges. You can now remove the print head by leaning it forward and up.
Some people use different solvents to clean the print head. I don't like to use solvents because they tend to dry out the rubber seals. I use distilled water.
Set the print head in just enough water to cover the bottom of the print head.
The more clogged it is the longer it needs to soak.
Before reinstalling the print head make sure it is completely dry.

Oct 28, 2010 | Canon PIXMA MP780 All-In-One InkJet...

2 Answers

Can't unclog black 3eBK nozzle.


If you said you replaced cartridges with new ones and it still doesn't work, the printer is the issue and may need to be replaced.

Nov 09, 2009 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Printer will not print in Black ink cartridg are full. what gives


Both blacks are in your print driver test pattern?
Go into the maintence menu and choose nozzle check.
It should rint a test pattern with the first grid being labled "PGB" if not your head is clogged.You can tru a solution of 20-25% ammonia to water and soak the black print head for a half an hour.Then completely dry the electrical contacts and re-install.
If that does not do it I have a more aggressive solution that requires a baster.

Jun 16, 2009 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

My printer does not print black & White documents


You just have to clean the printer head or change it.
Happend to me and solved it:
Open the top the way you use to change an ink cartrige...Unplug the power cord.. the ink tray will stay accessible.
Save your ink in some plastic wrap.
Just where you pull the ink cartriges is the head. Lift the little arm on right top of the assembly and pull toward you the black plastic kind of container..(for ink cartriges)..
that is where the head is attached. DO NOT FORCE anything..it should come easily.
At first place in warm clear water..use rubber gloves..often change water. When it looks quite clean..it is not. Unscrew the two littles screws holding the flat ribbon tip where the ink should go out..Beware...lift it gently..
underneat there is a small rubber part..just lift the end covering the black ink exit...Now pour all this in warm water mixed with Windex for some time and change the water till it comes quite clear. Now blow air from a compressed air can in the black ink canal..you will be surprise to see the amount of plugged ink coming out from there.Rince, dry with compressed air,screw back parts,place everything back and try an head alingment test to see your Black here again..

Apr 06, 2009 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Printhead problems Canon PIXMA MP780


that definitly sounds like it needs to be replace, have you tried using the printhead cleaning utility?

Dec 23, 2008 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

Canon pixma mp780


Try uninstalling/reinstalling the drivers.

Is the error light flashing?

From the printer utility can you print a nozzle check sheet or align the printhead?

Does it seem to be printing (feeding sheet and moving printhead) or nothing happening at all?

Try removing all the tanks, take out the head. If blocked try cleaning manualy by running warm water over the ink ports/printhead jets - dry off and reinstall.

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

2 Answers

Canon pixma mp780 printing problem


If deep cleansing via software doesn't work then you've got to manually clean your print head unit. Sometimes you'll have to bite the bullet and get a replacement print-head unit ($$). If you're at the stage that you're considering replacement, then you've got nothing to lose by cleaning the print-head unit yourself. It's simple. Remove all ink cartridges first then remove the print head itself. Place the print head unit in a saucepan of warm (NOT boiling hot) water and leave to soak for an hour. (Protect your clothes - it gets messy) After an hour, flush the printhead unit under a running tap. Don't run the water too fast or you may damage the unit) You should flush until the water runs clear. Do not attempt to clear the nozzles with anything other than water - they are very fine needle jets and you will damage them!! If needs be, return to saucepan and leave to soak in warm water again and repeat process. When you are satisfied that the printhead is clean, you need to dry the unit thoroughly. Shake as much water from it as you can then pat it gently dry. Next place it on some absorbant kitchen paper and put the unit in a warm place to thoroughly dry (Overnight in a warm airing cupboard would be good). Once dry, refit the unit put in (Preferably new - but I've used existing one's without problem) cartridges and run a cleaning cycle. Your printer should now work as if new!!! - In Most cases!! - sometimes though, you'll either have to replace the print head unit - which sometimes can be more expensive that simply replacing the printer. What have you got to lose though eh? CLIVUSS

Mar 26, 2008 | Canon PIXMA MP780 All-In-One InkJet...

5 Answers

Print head cleaning


The print head is the black plastic bracket at the back and bottom of the unit that holds the ink cartridges - it looks like one piece but its actually two. Remove the four ink cartridges and the just pull the back of the black plastic unit forward and lift out. There are no clips and it comes out effortlessly.

Jan 16, 2008 | Canon PIXMA MP780 All-In-One InkJet...

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