I have a Dell Precision 390 on which I just replaced the Motherboard and the I/O board. It has Windows XP on it but will not boot. I have even tried Safe mode but all I get is the text scrolling down the screen. When I look in the BIOS both drives are shown as SATA-0 and SATA-1 and both are controlled by the RAID BIOS. I want to reimage this system to Windows 7 Pro but cannot get the system to boot from the DVD drive and when I try to boot from the HDD I the screen the advanced options screen and no matter what I select the system will not boot. Since I can see both drives in the BIOS I would think I would be able to load an operating system. What am I missing here that I need to do to make this happen? Please advise.