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

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Prints green not enough black

Pixma780 problem

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  • heavenlee_ac Nov 22, 2008

    replaced both tanks still not working

  • heavenlee_ac Nov 27, 2008

    still not working ,how do i clean heads i think they may be the problem. thanks for the info

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Sounds like your black ink cartridge is not working. 1) Take it out and put it back in all the way so the cartridge is seated and makes proper connection. 2) The black ink may be malfunctioning and needs to be replaced. It may still have ink in it but the electrical connections are not working. Hope this helps you.

Posted on Nov 21, 2008

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Here is my solution, hope it will solve your problem.

From your post, I believe your CLP-350N printer has enough black toner. The black cartridge is on the far right side of the printer, so the black toner is harder to go to left side of the roller than right side. Everytime we start the printer, it will move some toner of each color to the roller before it shows ready to print.

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Step by step solution
(CAUTION: Never loss balance while tilting printer! You may drop and damage your printer! Hold the printer firmly all the time! Ask someone to help you if needed!)

Here, front of the printer is where you can access the cartridge, back of the printer is where you connect the power cord and USB cable, left is your left, right is your right.

1.Lift the front to keep the printer tilt to its back at about 45 degree
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You may try several times and print several pages each time before you finally cure the problem.

Good luck! And do it safely!

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Hi there

Sometimes, printers use colors from the other cartridges in order to form a deep black colour. It does seem that not enough pure black ink is getting onto the paper.

Can you check that there is enough black ink remaining? If so, go to the print options of the program from which you are trying to printer the image, and set the colour output to black or greyscale only. This may be within an option called Printer Preferences from the Print dialogue window of the program from which you are printing from.

Then, print an image as a test and see if it comes out in black only this time.

I look forward to your reply.

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Hi BabyM. I think you need new firmware update...Here is Canon site..: (Select your pc's OS before download)..Also can live chat with tech/support too...
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=DownloadDetailTabAct&fcategoryid=334&modelid=10444
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User Manual for PIXMA780


I was able to locate the website where you can get the manual from...
http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&fcategoryid=123&modelid=10444#DownloadDetailAct

Thank You
Computerrep

***Please rate accordingly...

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