Since I added a DVD burner, front panel connector plate for my video capture card, and a floppy/card reader combo, my Dell Dimension 2400 no longer fit in its cute little case. So I popped $15 for an ultra cheap Coolmax case. Man this thing is cheap....flimsy....but it will work until I can spring for a nicer case. Anyway, I swapped everything over last night but it wouldn't load the OS. The hard drive wasn't recognized. Turns out none of the IDE devices were. I have 2 HDDs on the primary controller and a DVD burner and a CD burner on the 2nd controller. I finally got it to boot by disconnecting the DVD and CD burners. With all 4 connected it won't recognize any of them. The one thing I haven't checked is to double check the slave/master settings aren't in conflict on the DVD and CD. It was late last night and once I got it to boot and load XP that was a stopping point. Any suggestions? The only difference from before is I only had the two HDDs and the DVD burner...no CD because of lack of slots. So I might try disconnecting the CD only as well. Wonder why having all four devices would render the IDE controllers inoperative like that though?