I recently had a defective MOBO replaced by ASUS. It's a P5B Deluxe. After reinstalling the MOBO and all original components the BIOS wouldn't recognize the HDD, a Seagate 320 Gb SATA drive. After checking everything and several restarts it finally recognized the hard drive. Once past the BIOS screen it wouldn't go beyond that. I kept getting an error message saying " NTLDR is missing, to restart press ctrl+alt+delete to restart ". I restarted several times with the same error message.
Fortunately I had on hand another identical Seagate HDD I had just bought last week with the intentions of putting it into an external drive case. So I took the original HDD out of the computer and installed the new one. The new one was recognized right away and I proceeded to install Windows XP with no problem.
Does anyone know what NTLDR means? I'm wondering if my original HDD was damaged when I had the problem with my MOBO.