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

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Canon MP780 Printer Problem

Our Canon MP780 is about 3 years old. It started not printing in black but would print in just a few colors. We have tried lots of solutions like changing cartriges and cleaning it.

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  • muzieknootje Jan 12, 2009

    I had the same problem, cleaned, dept cleaning. Tried all the possibillities. Nothing worked. Called canon services. Garanty 2 jears!! Im affraid I have to pay their problem with this printer. Many users had the same problems. Can you give advice?

  • PPGDG Jan 15, 2009

    SMine has stopped using cyan and the 6 black. I changed the cartridge ,but it does not acknowledge the new ink level. 

  • robbyfan1st Jan 16, 2009

    I have the same problem and have been unable to find a solution. I also followed all the manufactures suggestions to no avail. Would also appreciate a suggestion to rectify the problem. Am extremely disappointed in this product. Have has cheap printers with no problems, cheaper to replace than buy ink...."invested in the product because of the ink having separate cartridges for each color. Thought that would be more economical. Now I have a surplus of ink that I can't use. Would also appreciate any suggestion s to fix this printer. Thanks.

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  • 18 Answers

Try realigning the cartridges

Posted on Dec 25, 2008

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The color of my PIXMA MP780 printer has problems


clean the head of the ink. then do the calibration for canon.

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Canon Pixma mp780 printer will not print colors


I just bit the bullet and went out and bought Canon ink and replaced all my other Print Pal ink cartriges and my printer works like a charm again.

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Canon MP780 Printer Problem


Normal 0 Could have a corrupt driver.
Disconnect the printer or at least be sure it is turned off. I'd do both and when the CD software program asks you to connect the printer to the USB port, do so and it should again work properly.
Hope this helps. Bud

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

2 Answers

Colors stop printing


it could be down to the cartidges, if they are non canon orginal this could cause the fault, if they are canon cartridges it could be down to the purge unit no working corretly,

i know you have spent money already but it might be wise to spend 130 english pound with a years warrenty from canon and buy a new machine.

I hope this helps

Oct 21, 2008 | Canon PIXMA MP780 All-In-One InkJet...

1 Answer

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Are you scanning both black and white and color the same way? The ADF (automatic document feeder) uses a different scanning area than when you place the document on the scanning glass. If you open the scanner cover, look to the left of the main scanner glass to the narrow strip used for the ADF. Make sure this narrow strip is clean -- no ink or white-out or scratches. This can make your copies look dirty or smudged.

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Try a "hard restart", which simply means unplugging the power cord and replugging it after a few seconds have passed. If that does not work, then rerun the CD you used when you originally installed the printer. Both techniques reprogram the printer to certain extent. Hope one of these methods works for you.

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Sounds to me your print head is plugged up. This is not usual though because the majority of people use black ink much more. So, in your printer utility, do a deep cleaning. If that does not work, there is a thing called a purge unit in it. This is a usual way of draining waste ink to a pad that soaks it up. if the hose, or other parts are clogged, it backs the ink up and causes the print head to clog. If this is the start of it, do not waste your ink cleaning, and try not to let it sit too long. Contact canon, and let them kno what you think it is.

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