Sometimes, after you return a refilled inkjet cartridge into your printer, you may encounter a "cartridge not recognized" or "low ink level" error notification on your computer. How do you make your computer recognize the refilled cartridge?
* Remove the cartridge from the printer, then put it back in and try printing again.
* Turn off your printer and unplug it from your wall outlet. Wait a few minutes, then replug the printer and turn it back on.
If you can print as normal, then you can safely ignore the error message.
................... reprinted for all those concerned.