i will try to boot on it but i suspect hp efi bios will only execute signed efi applications... is it? any other suggestion ?
Tested to boot on some uefi compliant distribution... i have seen some access on cdrom drive but nothing else... still black screen i dissassembled the entire computer to see if there is a burned component but all seems to be good i have unplugged the cpu and replugged it. verified all connectors... still the same