Canon mg6120 cyan won't print,

A technique to improve print quality is to try and clean the cartridge nozzles. You may clean the cartridge by following the steps given below:
1. Go to the "Lexmark solution center." This can be done by clicking on "Start," go to "Programs" and Lexmark printer group. Click on the "Lexmark Solution center." Next click on the "Maintenance" Tab.
2. Select "Clean and Fix Horizontal streaks." Click on "Print". This will produce a printed page.
The colors that you should see here are black, yellow, magenta (a reddish purple) and cyan (a dark sky blue). You should notice the diagonal lines above and below the solid horizontal lines. These diagonal lines should be solid from left to right with no gaps.
If there are gaps in the lines or the print diminishes across the page, you should run the "Clean Print Nozzle" page a couple more times to try and clear it up. If you still have gaps at the top and bottom, you should "wick" the cartridges by following the steps given below:
1. Please open the "Solution center" again and go to the "Maintenance" Tab.
2. Select "Install color/black cartridge" and remove the cartridge or cartridges from the printer.
3. Get a damp paper towel.
4. Set the ink cartridge right side up on the damp paper towel so that the ink nozzles are against the towel and hold the cartridge in this position for about 15 seconds.
5. Now wipe the print head (on the bottom where the ink comes out) across in one direction only (left to right) until it looks clean.
6. Next dab the cartridge on the towel to make sure that the ink is flowing.
7. Snap the cartridges back into the printer.
8. On your computer, select "Old Cartridge install."
9. Repeat the "Clean Nozzle Page" one more time. If this fails to address the problem the entire procedure may need repeating.

Good Luck!!!!

First hardly reset the printer and the system

Worn print head. And for what they charge for a stinking print head you can get a new printer for less with a warranty to boot!

Try to do the Deep Clean Printhead function on your printer to force ink through the nozzles and clean possible clogs and dirt.

The printhead has either become too clogged to flush out with with the internal cleaning operation (which uses a LOT of ink), OR, the nozzles are not firing. If after several cleaning operations there is still no significant improvement, you will need to replace the print head. I see this frequently with Canon and Epson, and Brother inkjet printers. Usually, it is due to leaving the printer idle for too long, or removing a cartridge and not replacing it right away. The air gets to the residual puddle of ink in the head and dries it. Also, using compatible or refilled cartridges can risk clogging because the ink formula is not an exact copy of the genuine Canon formula. I recommend using only new Canon carts for replacement, and do not mix Canon with non-Canon carts.

You can find the replacement print head by Google searching "MP830 print head". Prices can vary from around $70 - $90. Changing it out is fairly simple. You only need to lift a lever that holds the head in place. Make certain that it is squarely seated, and then run a few pages of a color document, or do a couple of standard cleaning operations to "prime" the head.

Make sure the hed is NEW and not used or "refurbished". Here is one source on eBay that sells it for $78.00:

http://compare.ebay.com/like/330643273134?var=lv&ltyp=AllFixedPriceItemTypes&var=sbar&_lwgsi=y

Causes : Blocked by dry ink. Solution : Your Color i.e. Cyan & Magenta were malfunctioned/blocked. So try to clean them up tightly.. thanks

> replaced the print head

Did you replace the tri-colour ink-cartridge, or did you replace the print-head mechanism?

Are you sure that the CYAN part of the ink-cartridge is not empty?

The print head is clogged.Try unclogging with cleaning tests in maintenance mode.If not help you can try unclogging manually.Warning!!!This can lead to damage of print head.Try it in last case.Open the cover and first remove the ink cartridges.Then open the holder and remove the print head.Run hot tap water and put the print head with the nozzles up to stream water.Hold that 5 mins then turn the print head around with the nozzles down.Hold that for every color of 5 mins.Then put the print head in hot water with the nozzles down.Left
it water about 15 mins and then you must very nice to dry.When the print head dry put it in printer and start cleaning.If this not help you need to replace the print head.Call Canon for support.

it's a multiple problem....there is no enough ink for the head managment sensor to understand the good function of the print head.
Print a nozzle check to see what is going on
Then come back for more information

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.