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I'm building a comp and have my cd burner set as secondary master, dvd rom as secondary slave, and my hard drive as primary master. When the IDE's on each of these drives are hooked up (and yes they are hooked up correctly) the drives do not work (have no power). But when the IDE cable is not attactched to one of these drives, the drive works(has power). I know the cables arent defective, and I tried the burner on my old comp, and it detects it and works. I'm guessing that my motherboard is messed up? I have no cpu/vid card in my comp i'm making so i cant tell if the bios detects it. Also, my floppy works fine. Plz help.

Wierd.
Sounds like mobo probs to me, but only a guess. The power should be constant-on when the power cable is connected whether the IDE cable is connected or not.

Very weird. I've never heard of this. Normally, as long as a power source is connected, the drives will spool up. It's strange how they don't powerup when you hook the IDE cable to them. Before scrapping that mobo, I'd test everything you can. Is there another drive you can temporarily borrow to test the mobo? Have you tried connecting each one separately?
-SF

Hi when you say "have no power" not sure what you mean. If you are saying there is no 12V or 5V dc going to the drives, how do you know? If you tested the voltage with a DC meter than the power supply is bad, can not handle the load.
And are you saying with all 3 drives connected "have no power" but with any 2 drives it is ok?
With no cpu/vid card how do you know the floppy is working?

Are you setting the jumpers for Slave and Master, or are you using Cable Select?
I've run into a problem using CS and now make it a habit to set slave and master on the drives just to help eliminate problems.

I had this problem on an old mobo when the ide connector was in the mobo the wrong way round (no location tab on ide cable)

yep I agree with sidney and opman, make sure the cable is in the right way round for all drives, else they might not power up (has happened to me) and also check jumpers, if two drives on one channel are set to master or slave they will conflict. Check the sticker on ur drives to see what they say bout jumper settings

There are only one way these cables can go in, because they have a little notch at the top that fits in a groove. Also, i have my dvd rom jumper as master and cd rw as slave, and still not working. :(

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