if the ink is not compatible with your printer as some lesser quality refill your own, it might have gummed up your printer heads or like with my canon the chip overheats and diesluvs said:my black prints, elf.
that dagnabbin color ink isn't.
my color ink is new- that kind you inject. plenty of ink.
they worked fine, then went 'ka-put after a few printings.
i pressed its cleaning button, i'll test print.
thanks, guys.