I follow the officiel procedure in the pdf provided on the BIOS download page.Svet said:how you flashed it?
In the past, I've successfully updated the BIOS of my old GT780 following the same procedure.
When I try the CCTRL + Home trick with AMIBOOT.ROM file on a USB key, led of the key blink a few seconds and then .. nothing. Is AMIBOOT.ROM the correct name for the BIOS file to recover ?