hard drives might be recognized, but as you said you're not booting. Might be because it sees you're using a different mobo ... not the one listed in it's registry.
There's been times when I have successfully and unsuccessfully swapped hard drives with OS already installed from one machine to another. Sometimes it works ... other times it doesn't.
There's been times when I have successfully and unsuccessfully swapped hard drives with OS already installed from one machine to another. Sometimes it works ... other times it doesn't.