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I just put new cartridges in my canon mp980 . The yellow and black had gone dry for about a month, I know that is bad, so I removed the print head and cleaned it with alcohol and distilled water. I flushed the screens where the cartridges connect in the holder. I put a paper towel under the...

I have some electrical engineering experience with embedded devices so I decided to see what was going on with the chips on these cartridges. My first assumption was that these were merely eeprom chips and the printer was just reading info, updating the chip with the ink level and marking them...