Hope to get some help from here. I shipped my Desktop (CPU Unit) and when I tried using it last night, the HDD is not recognized even in BIOS. I tried another HDD but with the same result, no HD exist in BIOS. I then checked both HDs in a laptop just to see if they get recognized, and they did. So i'm assuming that the HDs are alright. I then tried attaching the HD thru USB in my desktop and it was detected but then the PC asks for the installation disk of the OS (which is another problem). But my question is how come the HD is detected thru USB but not thru SATA, is it possible that my motherboard has a problem? Thanks!