@sjensen said in Selected boot device failed:
That’s the only way the pc will boot.
What do you mean by that? What happens if you switch to UEFI? What does serve DHCP in your network? Maybe you can’t do UEFI PXE boot because nothing is serving the correct binary?! See here: https://wiki.fogproject.org/wiki/index.php?title=BIOS_and_UEFI_Co-Existence