I have just changed a motherboard and in the process ran XP Pro repair. The repair process runs smoothly until the screen shows "Press any key to boot from CD", which I DO NOT. It then goes to the Windows boot screen that allows you to select normal or safe mode. It does seem as though it trys to boot from the hard drive. I've tried both both normal and safe mode, with the same results. I get the "press any key ...", then the "mode" screen.
I have re-run the repair the process, and gotten the same results. The drive, and op sys, were both running fine. It was the motherboard that failed.