A desktop in our office went down the other day, displaying the message "Board Failure" at startup, with a rapid beeping sound, in dos before it enters the windows startup. I replaced the motherboard, but now at the same place it displayed the message before, it's saying "Board Failure" then "unable to locate disk drives Sata 01, Sata 02" etc., and beeps rapidly again. It then asks me to enter setup or procede. I can enter setup fine, and I can procede but when I do it locks up and doesnt respond at the windows login screen. The board was an exact replacement for the desktop, and didnt come with an installation cd. It's a Dell Dimension 8400 if that helps. Is there something I did wrong, or didnt set up correctly, or could this be the hard drive instead? This is urgent, so it's worth 500pts to me if anyone knows what's going on.