You may receive the following message when installing your cartridge. Just click the close button on the first screen. This is a screen that Lexmark has made to try to make you buy only brand new cartridges. This screen will only appear when you first install the cartridge. The cartridge will still print fine.
Your ink level indicator may show your ink level to be empty, but it is not. You will know when you run out of ink when your cartridge no longer prints ink on the paper. If the machine asks you if you are installing an old cartridge, please tell it "New."