|Still the issue of power and cables and maybe bios settings come in to question. |
We never found out if the controller was enabled in bios.
We may need to know if it needs to be set to sata or ahci or even ide to work.
As noted it could end up being that the controller is bad.
Try running hard drive diags maybe too.
While it is not always mandatory to see the drive in bios it is always my best place to start. In this case you should be able to see the drive.
Could the drive be on a pci to sata adapter card?
Hang up and live.