Firmware Upgrade July 2022 stop third party ink cartidges disable dynamic security

[Totorodesu]

I have an HP OfficeJet Pro 7720 (well two of them unfortunately...)

Even though I'm sure I turned the firmware upgrade option off (as I have been through this routine so many times going back to 8600) it seems to have installed the latest firmware update on for the 7720. This has flipped on the dynamic security option whereby you only seem to be able to print to HP cartridges and I'm using third party cartridges.

You can't downgrade the firmware, as another version doesn't seem to be available on the web-site (only the latest version)

I have an older firmware from two years ago when I previously had problems and it won't let me install it

I simply want to override the settings in the firmware to let me use the third party inks as before.

Options for turning off the dynamic security only seem to apply to 7740's built before 2016 - https://support.hp.com/us-en/document/c05308850 - why?

https://support.hp.com/gb-en/document/c05310148?openCLC=true - doesn't seem to allow me to override it either

For the love of god (and for my current print job) can someone please tell how to override this option and use third party cartridges.

My only other current solution is a 14lb Sledgehammer - at least that may be enjoyable to use in comparison to an HP Printer...

Cheers

Brad

[Totorodesu]

Please see my post under Third Party Ink Jet Solution to Firmware Problem July 2022 

Please read all the post though as there are caveats in there and at your own risk...