Let me get this right, the DVD & CD drives will work when the ribbon cable is taken off, but they won't work when you have them hooked up? Wow,that is weird. Are the Jumers set to what they should be? One MA, One Slv? Or both CS? Definitely do Kunz's advice, clear CMOS, but wow.
I'd try to run one first too, see what it does, or do the other, solo, if still nothing, may be the cable, if not pins bents, soemthign amiss. Good o try another cable if possible.
Peace, Penewah!
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