I know this sounds like a bit of a silly question in some ways but humour me :P
Basically I want to make it virtually impossible for a computer to start up without having a LAN cable plugged in. I don't want to re-image the computer or boot using the LAN, I just want it to send a signal down the LAN cable which will allow the computer to boot. Without that signal being sent the computer cannot boot.
Is this possible to do? If not are there some alternatives that could be suggested?
Thanks in advance! Niels