If Your printer has updated and now doesnt recognize third party ink cartridges - You can recover Your chipless firmware following steps below: Step 1 Download latest chipless firmware version form our site: https://chiplesssolutions.com/download.shtml Step 2 Run EPFWUPD.exe updater. Step 3 Start updating process and follow it.  Step 4 When process comes to about 70-80 % (it will take -3-4 min) - printer will reboot and message will appear on printers LCD: