Intel I225-V/I225-LM Rev 1.x Lan Controllers Firmware Version 1.89

Have you also tried a clear cmos?

And you sure that your version is an I225-V or rather I225-LM which is the most common?

There is an option in the bios to enable it or disable it, but thats all there is for it, theres no status in the bios for it, yes ive tried clearing the cmos multiple time on every bios flash I did last night, which was probably about 8 times lol, I didnt want to push my luck too hard though.

As far as I know its the I225-v, I could give the LM firmware a try.

EDIT: Just gave that a try, its said the same thing "no supported adapters were located"

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Unfortunately I brought it from a guy on ebay who ive asked for the receipt, but hes not replied to me, so I guess hes not willing to help with warranty, I contacted ASUS and they said for the UK you have to send it back to the shop you brought it from, so theres no direct RMA, I have 2 choices, buy a new one and maybe sell this one letting people know the LAN doesnt work, or just live with it.

On all the intel Z790 series it's LM test yes in case but I doubt

it's as if it was deactivated because no active led so not possible to do a ping, I'll see if there are other possibilities

the crash and due to the update of the SD site?