A sata HDD with Windows XP SP3 worked until the motherboard failed. An ASRock socket 939 was installed and on boot up got the "NTLDR is Missing" message. The computer will boot from another HDD and the HDD with the problem was scanned successfully with "CHKDSK" and several anti virus/malware programs. The repair option on the XP cd was used to replace NTLDR & NTDETECT.COM, fix BOOT.INI and fix the MBR. A new version of XP loads until it trys to start XP on the HDD and ends with the "NTLDR is Missing" message. Any thoughts on what to try next?

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