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

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All of a sudden almost everything is coming up green. Photos and misc copies look horrid

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  • vjkoshivas Mar 13, 2009

    I unplugged as you said and I downloaded the various updates.

    It improved but did not fix the problem. And now it is grabbing

    multivple pages to print one also. I'm in the middle of tax

    season - HELP!

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Ok, this is the first action i would take. completely deactivate this printer by unplugging from the wall. be sure to shut down all queued printing jobs before this action. leave this unit unplugged for 5 mins. after this hard reset, plug the printer unit back in the socket and, resatr the unit. this should fix this firmware scramble. you may want to downlad a softwre update as well. drivers and firmware. thanks for using fixya:)

Posted on Mar 03, 2009

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Posted on Jan 02, 2017

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Not sure what this part is called, sort of a guide ribbon for the printer/ink head. can I replace?


Hi
Is this the part you mean? One example I found, if this is the part then it looks like its available. The linked website has photos of other parts if this is not correct. I use this website because it shows photos of the parts, I have no affiliation with the company.
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Why is my printer printing out only green on my photos?


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Color on photos suddenly has a blue - purple wash with no greens


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The printer prints very slowly all of a sudden. It took over an hour to print out 4 pages. I've unplugged everything. I've cleared the print ques. Same thing is happening when I copy. Help!


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Sounds like your printer is malfunctioning and has a problem. First I would delete this printer then reboot your computer and reinstall it and try again. If no success printer needs to go to shop or replace it.

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1 Answer

Too much green


Hold the print head over a steaming kettle take care not to scald yourself. The ink will run out of the bottom of the printhead just dab on a piece of paper towel, when you see green you will have cleaned it. I dont know if this will do any long term damage to printhead but it has worked three times for me

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