Non HP Chip Detected. How to Downgrade your HP 7740 Printer firmware through usb with the .ful file.

This post is the follow up to my downgrading HP Officejet 7740 video. It shows you how to download the .ful file to put onto your flash drive so that you can downgrade the firmware to allow you to use third party cartridges.

Go to this new link to get the 7740 .ful folder, the mega link has be flagged and deleted.
https://www.mediafire.com/folder/koxa...

And for every other .ful file here is a link below, please note i have not been able to test all these files, I just was able to extract them from the .exe firmware. I dont think HP made them to work with every printer version.
https://www.mediafire.com/folder/9t09...

NOTE this is just an alternative option to those who cant get to downgrade their machine via the PC. I cannot guarantee this will work for everyone, also some printers do not have usb ports to be able to use this solution.