I know this might be a horrid thought but I had an Asus mobo where the IDE drives died, turned out the HDD controller on the mobo died!
I felt the chip and was red hot, the next board had the same chip, felt it and was very hot so I put a heat sink on it, that fixed it. Just thought I'd mention it though, you could try changing the drives to the secondary Ide controller, I assume you have SATA HDD's?
