Canon PIXMA MP780 All-In-One InkJet Printer Logo

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Posted on Nov 28, 2007
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Blank printing I just placed a new black ink cartridge and my printed documents are coming out blank.

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  • ccbraz Nov 28, 2007

    There is no clear film. I touch it and black ink comes off on my finger. Could it be something blocking it within the printer?

  • ccbraz Nov 28, 2007

    It's working now. Thanks!

  • eyeman Nov 28, 2007

    Same problem, worked fine for a year, now black will not not print, not even the test grid. Genuine Canon black ink flows through the head well onto the paper towel. Also will not allow print head alignment so probably related to the same problem? Almost seems to be electrical but contacts are spotless. Colors are fine.

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  • Posted on Nov 28, 2007
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Look carefully at the new cartridge. Some of them have a clear film that has to be peeled off before it can be used.

  • Anonymous Nov 28, 2007

    I'm not formiliar with that printer, but you can usually see the cartridge moving inside. Also, check to make sure that the electrical contacts are clean and making a proper connection.

  • Anonymous Nov 28, 2007

    No problem, glad I could help. Happy holidays!

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If this does not work, look in the manual that came with the printer and check out the troubleshooting section.
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