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

3 Answers

3e Black cartridge won't print

I've tried cleaning, deep cleaning, etc, with multiple nozzle checks. I am using a brand new cartridge and even tried a second new cartridge without success. The top band 3eBlack on the nozzle check pattern is now completely blank. The more I clean the worse it has become. The cartridges are all firmly seated in their print head slots. All inks are the correct ones for this printer. Any suggestions appreciated. Can the print head be cleaned manually without requiring the expertise of a service center - nearest is 75 miles away. Office is dead in the water unless I can get this working today. Only alternative is to purchase a new machine.

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  • Anonymous Apr 06, 2008

    I have the same problem... the 3e cartridge is not being activated electronically to distribute ink, or the pathway from the cartidge to the paper is blocked in some way. I took apart the carriage that supports all of the cartidges, but no fix was found. I'm hoping to learn more on the internet or via Canon today.

  • Furmata Apr 09, 2008

    I have the same exact problem. I called the tech support people and they sent me a new print head--that didn't correct it, either. Then I tried doing a head alignment and the machine beeped that it 'failed' the alignment test. I called the tech folks back and they said that it has to go in to be serviced--and my nearest service place is also the same distance away as yours. I can't decide what to do, either. I liked the machine a lot--when it was working.

  • jsmcfadden Apr 11, 2008

    Hi all - I posted the problem. After checking out some support sites, I found out that the print head can easily be lifted out of its carriage when cartridges are removed and the carriage is in the center position. In my cases there was quite a bit of clotted ink on the print head. I used some window cleaner and a paper towel to remove it, and amazingly that completely eliminated the nozzle problem with the 3e cartridge. There must be some other issues though, since Furmata's new print head didn't result in successful printing. Jim McFadden

  • boardtc
    boardtc Apr 25, 2008

    This printer worked great for us for over a year with very little use - max a couple of hundred copies in that time. I first got this problem last summer. I did all the cleaning options mentioned and eventually bought a new printer head for £45. We then moved house so all our stuff went into storage. In the last month I've unpacked the printer and installed the new printer head & done all the cleaning again, but like @furmata I have the same issue - the page prints blank when printing/copying in B&W (3e) but fine when doing colour (6e).

    It starting to sound like we have some dodgy boards on our MP780. Surely it's time for Canon to step in now. I think @Livehapy2 is right about a recall being needed.

    I want to write to canon with our problem as they do not seem to be taking any notice of us. I would like to quote as many customers with the same problem as possible. If you are interested in adding your name to the letter please send me you full name and address and quote to use - email to boardtc /at/ gmail /dot/ com.

    Thanks a lot,

    Tom.

  • lou65sr Jan 19, 2009

    I have basically the same problem. I have tried everything, new ink for all the colors & now, all I get is blank paper, nothing prints & I've tried all the cleaning, still notrhing. Help!!!!!



    hutton_louise@yahoo.com

  • Anonymous Jan 20, 2009

    My printer first refused to do alignment. It failed each time. It first stopped showing the cyan horizontal bar when I do nozzle
    check. Then it refused to print the B D H K bars when I did the manual alignment. I followed all the instructions, carried out all the maintenance steps several times but no change. I pulled out the print head and cleaned off the smudged ink with face wipes but no change, I need help today.

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I had the exact same problem with my black print. I took the cartridge out and cleaned the print head with a Q-tip and alcohol. This corrected my problem. I guess we all need a drink sometimes!

Posted on Jan 17, 2009

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I ended up bringing it to a canon dealer who checked it out and said the problem was because non canon ink had been used. I bought this printer because I could buy cheaper ink that was meant to be compatible. I had to pay euros 182.95 and now it works perfectly. It hurt but the alternative was recycling it.

Posted on Oct 29, 2008

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Sounds like it is a recall time I am having the same problem

Posted on Apr 20, 2008

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I'm not an expert but I go through a lot of ink.. I have found that even with new ink some of the tanks of ink aren't any good especially with compatible which i buy a lot of because it's a lot cheaper (ebay). With that ink I have gone through 10 cartridges in a row before finding one that worked correctly again (I mean out of 100+ cartridges hitting a run of 10 that where bad but the rest good.)

Also, a tech for epson once told me to hit deep clean 7 times in a row before a head check to clean their nozzles.. That has helped with my printer and at Fry's electronics, they have a cleaning solvent in kit, haven't tried it, but i have run alcohol through mine but I'm told that is very ******* the print head (dissolves the glue).

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