Mp780 color is correct but to light

SOURCE: my canon i860 is printing funny stripes on all colored docs

I am having the same problem. Does anyone know the solution to this one?

SOURCE: MP830 Cyan Ink won't print

To Fix the stupid Cyan, just unplug the printer, it may take more that one time unplug, its stupid problem, printer needs to reset, I have a full ink of Cyan but it says this "There is more than one Cyan" on the dispaly on the printer, and windows that its missing. I don't know what idiots programmed the printer. but screw them.

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SOURCE: Printer will not use the magenta color

I had the same problem. It is most likely that your print head nozzles are clogged. Your choices are to attempt to manually clean them, or order a new print head from Canon.

Attempt the manual cleaning at your own risk, this doesn't always work. When it does not work, it means your print head is damaged.

To maually clean the print head. Printer cover up (so you can get to the cartridges and print head). Turn the Printer Off. Remove all the cartridges (I put each cartridge in a separate zip lock bag). Then flip up the lever and remove the print head.
Now heat (don't boil) distilled water (Iused a good sized cook pan and a plastic measuring cup to pour the water). Find a container you can soak the print head in (I used a deep alluminum baking pan). Pour the hot (not boiling) distilled water over the print head molding where the cartridges seat down (hold the printhead over your diposable alluminum pan). Then dunk the molded print head part into the pan numerous times. When the water gets dark change it (be carefuill not to stain the sink). Then slowly pour the hot distilled over the print head (opposite side from where the cartidges seat in). Eventually no ink will be in the water. Set the print head on a dry paper towel, and let it dry for 24 hours or longer. Reinstall the print head, then the catridges. If it worked, your true colors will return. It make take up to 15-20 photos to get all the ink catridges flowing-be patient. You can also just wait 24 hours after re-installing the cartridges, and hopefully it will take less photos to see the correct color match.

Never keep printing when a cartridge is low or out.
Print a few prints every week. Not printing for weeks causes the printheead and the ink flow to clog!

Good luck. I just recovered my S820 and my i900D using the above cleaning method. Like everything else, your mileage may vary! It cost me $1.29 for distilled water and about an hours worth of time!

SOURCE: canon pixma ip4000 color not printing correctly with full inks

In both cases be sure using correct ink. Use of generic ink can lead to leakage of catrridge seats do to crossion from inferrior ink quality (per Cannon). Be sure ink in proper locations - see manual. Run the maintenance proceedures: cleaning then print nozzle pattern. If all colors are not proper after two or three cleanings, perform deep cleaning. Print nozzle pattern after each cleaning. This should clear up problem. If not, print head may need replacement.

SOURCE: cannon ink jet quit printing black

To solve the printing problem..

# Hold the cartridge upside down, with the bar-code label facing you and take a damp paper towel. # Use the towel to wipe the printhead of the cartridge on the bottom (where the ink comes out). Wipe the printhead horizontally in one direction only (left to right). # Continue doing this until it looks clean. # Then dab the cartridge on the towel to make sure the ink is flowing. # Next, look inside the printer and locate the carrier that holds ink cartridges. Caution: Make sure the cartridges are not installed at this point.
1. Look for a shiny piece of metal underneath the contacts at the back of the carrier. 2. Take a damp cotton swab (use water only!) and wipe along the bottom of the shiny metal piece. Note: You may need more than one swab.
# Reinstall the cartridges, making sure you snap them correctly into the printer.