Canon MP620 will not print cyan in spite of having run the cleaning process several times and changed cartridge 3 times.

Inkjet printers need to be used frequently to prevent inkdrying out in the print head nozzles.
If the print head cleaning maintenance routine does not clear the blockages,then print head needs replacing, but it may be expensive.
It may be more cost effective to buy a later model and better printer thanreplace the print head.

Use the CANON software on your computer to run some "printer maintenance", namely a few "print-head-cleaning" cycles, to try to unclog any blocked ink-jets that are _not_ shooting ink onto the paper.

You say all colours look blue? If this is true, does black look blue? If so then black is not printing at all so blue takes over. Did this machine print colours ok before you changed cyan? I would suspect that you are using compatable ink cartridges and they are suspect. check that all the cartridges are in the correct positions. Then run the cleaning cycle and see what happens. If the problem still persists then I would change the print head. The print head part number is QY6-0073-000.
Good luck

Are they new Canon cartridges or third party cartridges?

For optimum printing results change your cartridge not long after the printer is reporting low ink levels.

Printer cartridges print in CMYK (Cyan, Magenta, Yellow & Black)

Bad cartridge.

Hi I think I had a similar problem, I let the black and cyan run down really low. then it took a week to replace the cartridges. The result was no black and cyan. I put in new cartridges and of course no colour.

Solution: Take out the cartridge holder and take a cotton bud and soak all the ink pads in alcohol (no not beer)

I used clear alcolhol from the chemist, the reason for this is it dries out very well after the clean process with no contamination. Give the ink pads a good soak and rinse out in very hot but not boiling water and allow to dry. Then go through the deep clean process in 'printer maintenance'

You may have to do that several time but be patient and it should clear out and start to print again.

MCL

1. Get compressed air
2. Run Printhead under HOT water, do not worry about contacts getting slightly wet.

3. Blow compressed air with straw attachment into screens where the cartridge nozzle sits on printhead. then let it sit and dry.

4. reinstall print test page

5. if this fails open paint/photoshop and print a page of the color that is not printing correctly. rinse and repeat until colors flow freely.

I have several ip4300s and I have yet to give up the ghost on a printer with a clog ujsing this method.

Hi starge. I once had that kind of problem...Busted my head trying to fix it.....
It turn out that I bought a Bad cartridge. Brought it back to store for a new one (SHOULD be Original
manufacture ) and its fine now.

Then try this, it works for me!!!
Canon will hate me for this.

1. Remove ink cartridges.
2. Remove print head.
3. Go to sink or tub (stainless steel, not plastic type), pick up a roll of paper towel on the way.
4. Fold several layers of paper towel and place on flat surface.
5. Run hot water until HOT!
6. Turn hot water back to a dribble.
7. Run the dribbling hot water through print head being careful not to wet the gold contacts.
8.When water running through print head is clear, place print head on paper towel.
9. Repeat number 7 and 8 until no colour shows on paper towel.
10. Gently DAB print head (DO NOT WIPE) inside and out with dry paper towel until dry.
11. I normally replace print head after drying, but you may wish to let it air-dry overnight.
12. Replace print head in printer and install cartridges
13. Start printing.

I do this to all 4 of my Canon printers every 6 months or so.

If any colour fails to print after this process it means your print head probably needs replacing.