Just to be super clear here, what do you mean replace the key? I'm just trying to understand because I THINK did exactly that. I created a new install on a thumb drive, copied over the config. Put it in the server, and after it posts I just get a blinking cursor. If I turn it off, put the old drive back in, power up, it goes right back to the stopped part.
If I take the newly created thumb drive and boot my laptop from it, it boots successfully. So I know the new drive is good.
I tried different ports on the server, no difference. It seems like my pc only wants that drive. I reset the bios. No change.