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

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Printing problem I noticed that black was getting fainter on black and white and colour copies and prints (just paper-didn't do photos)and then it faded away completely, even though I replaced the cartridge(3e). I replaced both the 3e and 6 black to see if that would fix it. Nothing. Nothing black would come through. Then I removed the print head and wiped it off with a damp cloth and put it back in, and it automatically aligned the print head. When I printed a colour copy anything black had white stripes through it, and black and white copies are all striped. Help!

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  • Pam Peden Mar 23, 2007

    Thank you! I'll try it as soon as I can.

  • Anonymous Mar 25, 2014

    can not print any colour only black white grey

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The black cartridge printhead needs to be cleaned or replaced. Follow your printer manual instructions.

Posted on Mar 20, 2007

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The MP780 will not put up with non genuine ink, you will need a new printhead and probably a new purge unit. Now people will jump up and down and say I'm wrong, but I am not as I fix the things.

Posted on May 20, 2007

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