I have an MP 780, that started not printing magenta. I tried a new cartridge, and eventually replaced the print head. It worked for a few days, then did the same thing. I complained to the company that sold me the new print head, so they gave me a different one. Again it printed fine for a day or two, and now it doesn't want to print cyan.
If I deep clean a few times, it starts to come back. I really like the printer, I hate to buy a new one (esp. after purchasing a new print head for it!) It is a few years old however. Any ideas?
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First run the CLEAN HEADS and see if that helps. If you don't use your printer at least once a week the Print Heads get dried out and will not allow the ink to pass through to the paper. Go to control Panel and click on Printess. Then when the window comes up, CLICK on Properties TAB and then in the next window, CLICK on CLEANING. You may have to replace your PRINT HEAD if that doesn't work. Hope this is of some help. Bud
Remove the black cartridge and soak it with an alcohol free window cleaner soaked paper towel let it sit on the towel for a good thirty minutes then wipe clean and put back in printer run nozzle check if necessary.
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!
I was having a similar problem-- what was happening was the print cartridge head seemed to be letting the colors leak into each other. (the science behind this is beyond me!)-- I noticed that instead of being cyan/magenta/yellow, my yellow cartridge had actually turned green, magenta was picking up blue and was turning purple, etc etc. I ended up replacing the printer's printhead and all the color cartridges and then it worked. You can order printheads online. Not sure if this fixes the original reason why they got all mixed up in the first place-- if the printer will continue to allow the print head to leak the colors into each other-- but hopefully that's a fixit!