Okay, I'm completely stumped.
My Silverstone ST1000 PSU came in, and I was able to switch all the connections--but it's not turning on. Of course, it could be a dud (I doubt it), or I could have unplugged something without realizing it, but I noticed that the small light on my motherboard did come on (though not the two number display).
EDIT EDIT: Well, I isolated it, I'm fairly certain: my hard drive rack has a strange 12-pin to 8-pin connector, and without it, I can't turn the PC on. Short of taking the whole thing apart, I'm boned, I think.
Que sara, sara.
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All you need is to connect the 20/24 Pin ATX connector which provides power to the motherboard, and etiher the 4 PIN ATX auxiliary connector or the 8 pin EPS12V connector for the Processor. If you close the circuit on your PSU and see some sort of light on your motherboard then it has power.
If this doesn't work then get Silverstone on the phone and request an RMA, you should never just settle for bad components. You'll need to tell them your purchase date, the merchant, and provide a copy of the receipt, invoice, or mailing slip (should be able to reprint your order if you bought online).
Check to see if you've correctly connected the front panel connectors (the power switch 2 pin cable in the right header).
I have no idea what you mean by your HD rack requiring some sort of power connector. Just connect the standard IDE (Molex, 4-pin) or SATA (flat, and long) connectors from the Peripheral outputs on your PSU to your individual HD's. There's no way that you weren't supplied sufficient cables with any sort of quality 1000w PSU.
There's an 8-pin plug right behind the keyboard/mouse PS/2 connectors.
I thought this was the issue too, until I plugged everything into the old PSU outside the case and was able to boot on and function normally.