deskthority

So i recently bought a G810 Keybord for 20$, the owner said that the keyboard stopped working after firmware update, he did RMA and got a new one
I plug the keyboard in to the pc and it does the windows sound and it appears in device manager as a keyboard, but logitech gaming software dosen't recognize the keyboard and i can't update the firmware
I already tried diferent usb ports
I would like to know all the methods that i can do to unbrick or fix that keyboard

If i change the controller chip on the keyboard pcb would work?
I was thinking about plugin an teensy on the pcb