Hello. I have computer that has been working fine and all. One day, when I turned it on, the BIOS would not detect the HD. I tried changing the Interface cables, power cables, jumpers(different configurations). I tried using it in a different computer, and it will not detect it. Could there be any reason for this, or is my HD gone? Cause usually when a HD fails, don't you see "Primary Master Disk Failure" or something? There is a LED right on the HD, it lights up when I turn the computer on, but no detection. Thanks.