I have a HP OfficeJet 5110v all in one, for which I recently successfully refilled the black ink cartridge. This is the first time I have been successful in several attempts to refill a black HP ink cartridge, having previously had an OfficeJet 500. I decided to try one more time before giving up and being robbed by paying 30 + dollars for the couple tablespoonfuls of ink in a new cartridge (if that). I really, really, REALLY REALLY wish somebody could get a class action lawsuit that would stick going against the manufacturers. But, I digress. Anyway, the printer works fine and print quality is fine. The only problem is that the graphic in the printer software helpfully indicates that I have no black ink. And when I am printing, I often get friendly reminders that my black ink supply is low. This is nothing more than HP surreptitiously trying to force me to buy a new cartridge. I know that there are ways (detailed in the refill kit instructions) to reset this revenue generator in other brands of printers. Would uninstalling/reinstalling the printer software help (which I would rather not do if there is any way around it)? Is there anyway to get rid of this or is it just a gremlin that I will have to be willing to live with ? I am not going to buy a new cartridge until I absolutely have to and there is no way around it. I don't like the expense, but to me it is more about the principle and beating the manufacturer at their little game, since there is no defensible reason that ink cartridges should cost so much.