Welcome to the world of Canon. Simply put, the PG-210 CL-211 cartridges have what I like to call "digital fuses" built in. One fuse for "new" and one for "empty". When you install a new Canon cartridge both "digital fuses" are intact. The "new" fuse tells the printer that it is a new genuine Canon cartridge and resets the page counter internal to the printer. With the page counter reset, the printer "blows" the "digital fuse" and that cartridge enters the used state. When the page counter on the printer believes the cartridge to be completely empty it will "blow" the second "digital fuse" and the printer will from then on refuse to recognize it as a valid cartridge. Some claim to have ways around this, but Canon really has won this battle. My Cartridge World store does not refill these cartridges and does not recommend refilling them. Buying original Canon cartridges is what we recommend.
SOURCE: refilled ink cartridges on pixma mp490 ...will not print
I know this is frustrating. I am all for recycling and using refilled ink and laser toner cartridges. However, the manufacturers make most of their money from ink and toner sales. So, from time to time, they will encode or datecode cartridge chips. The only times I've been ale to get around this is by using at least one genuine OEM cartridge to trick the printer. If that does not work, try another et of refills, or you will have to use only OEMs.
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