The raid array in one of my machines recently died (two SATA WD2500JS's) so I got a Seagate (ST3160318AS). After putting it in the 0 position on the board with a new sata cable, I started getting the "No bootable device found -- insert a bootable disk and press any key to continue." error even with my windows disc in the dvd drive. I started swapping around things into other machines and found the drive, the sata cable, and the optical drive to be in working order but I still get the same error. I then put the Seagate in another machine, installed windows on it, threw it back into the computer I wanted it in, and I still get the error. I have tried the drive in all of the sata positions on the board and the bios does recognize it in every position. Last night I pulled out the CMOS battery and defaulted the bios to no avail. I just thought it would be worth trying since I am all out of ideas. This is such a weird problem. To summarize: Windows will not boot from the hard drive, Windows startup will not boot from a dvd, other operating systems will not boot from usb, and all parts are good (I don't know about the motherboard since I have no way of troubleshooting it, although the bios recognizes the optical and the hard disk). Any help will be greatly appreciated.