SteveAmb 0 Posted June 15, 2021 Hello, I have continues sytem ink on my c5790 (refillable catridges) but after some time now the printer says i need to replace the black ink supply unit. I need to upgrade the firmware to chipless Quote Share this post Link to post Share on other sites
Admin 17 Posted July 13, 2021 Good afternoon! You can buy a key through our website in the "buy" menu. Choose the printer series, printer model and number of keys you need. From here you can place your order. You can pay for it by bank card or via PayPal. Follow this link: https://inkchip.net/price/ you can the instructions for your model on the website Quote Share this post Link to post Share on other sites
