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

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Hi Our Pixma 780 is showing a ##343 error, and won't print, or even allow us to switch it off, except by removing its power lead. I had just replaced an ink tank, and done a lot of A5 printing very sucessfully. Then it stopped, and flashed its ##343 error message, since when it has resolutely remained unusable. Please help Mike Kelly

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  • mike_kell969 Jul 05, 2010

    Many thanks for your very quick response.

    We have decided to buy a new, non-Canon printer, as a silent protest, because Canon should not sell a printer which can't be economically serviced - our local printer engineer won't attempt to replace the waste ink pads due to the time/cost compared with a new printer of equivalent quality.

    Thanks again.

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  • 712 Answers

This is a waste-ink full error. You have to replace your waste ink pads. If they are not, the printer will more likely begin to dispense ink out of the bottom of the unit. Check out canon.com for your closest authorized service facility center.

Posted on Jul 05, 2010

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