Question about Canon i850 InkJet Photo Printer

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Problem with colors in Canon i850

My printer (Canon i850) does not print any color but yellow and black. I checked the cartridges and they are all full. I also did nozzle check and the rectangles under the letters B, C and G did not appear. The only colors that appeared were: light blue, black, yellow and pink. I also used the regular and deep cleaning option but this did not change anything.What should I do?

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  • Sonny Fields
    Sonny Fields Mar 03, 2008

    My i850 prints only in yellow and sometimes not at all. I have removed the printer head and let it sit in windex cleaned it well blew on all three ports and color would come out, rinsed it good in hot water and dried it good, replaced it to no avail.I even changed the ink in each color.

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I found a solution My black was not printing every 1/2 inch. What I did was I took the print head out and removed the ink cartilages. This gets messy. The print head has two screws at the bottom. Remove those two screws and carfuly using a small screwdriver. pry the white peice away from the main body of the print head which is black. You will hear two snapping sounds. That is okay you are not breaking anything vital. The snapping is the glue holding the tan/brown ribbon cable to the body of the print head.
Underneight the white peice is a gray rubber gasket. Leave the gasket alone. Focus on the white peice this is the actual print head.
Hold the white peice up to the light looking thru print head screen
Eye ----> print head screen (tan brownish color -------> white plastic that was stuck to black plastic with gasket ---> Light source
Looking thru the print screen you can see any dried up ink pigment. If you do, this is causing the problems of skipping colors at regular intervals. Soak in hot water (not boiling) or iso alcohol. Using a compressed air source try and blow the pigment out of the screen. Then use a syringe to **** water or alcohol. thru the microscreen; syringe ( ****) -----> white part with holes for colors-----> microscreens -----> water or alcohol. If you do it right you should see a pigment clot in the syringe.
Dry everything off put back together. and Print a test page. It took me 10 minutes to get my printer working again.

Posted on Nov 11, 2008

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OK this is the tricky part. You will have to take your printhead out of the machine (the peice of plastic the cartridges sit in). It just has a single arm holding it in and nothing else. There a few things you can try I will list them in order of safest to least safe.

1. Leave the cartridges in the head (even if you have to hold them in with your hand) and use a thin head on a decent vacuum cleaner (preferably one that can handle wet and dry so you don't get ink everywhere) on the bottom of the head where the ink comes out. You may be able to suck the ink through effectively removing any blockages.

2. You can leave it to soak in Isopropyl alcohol or windex or really hot water (not boiling) and it may remove any blockages. You must make sure that it is completely dry before reinstalling it though or you will wreck the head.

3. Using a jeweller's ring cleaner sit your printhead in an inch of water and activate it for 60 seconds (This can also damage your printhead).

You can get an idea how successful you have been each time by dabbing the bottom (where the ink comes out) onto paper towel or a tissue. You should see 4 lines, black, cyan (blue), magenta (red) and yellow.

If all of this fails you may need a new printhead which is dearer then a new machine.

Good Luck.
Please rate my advice, good or bad.

Posted on Feb 07, 2008

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I have to ask this question of you, just to make sure this is not an issue. Are you using a factory new ink cartridge?
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have a nice day!

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