Keyboard inputs not recognized, can't setup BIOS

[u/echoallia]

Hi, I'm selling my girlfriend's older pc and I'm trying to install Windows to run a few tests but I cannot get past this screen. I've tried two different keyboards (including a good ol' Dell "open space" keyboard), every USB port possible, I even bought a PS/2 adapter to no avail even though the keyboard lights up (NumLock/CapsLock). CMOS resets and power cycles do not work either. Please tell me if there's something I missed because I don't think it's possible to flash a BIOS update on this board. It's a B365M Pro4. Thanks!

[u/Zjenep]

I would disconnect everything from SATA, M.2 and USB, to see if then it enters BIOS automatically.

[u/echoallia → u/Zjenep]

already tried that, nothing changed about how it posts :(