If it is really "Nothin at all" as in Nothin, I'd suggest checking to see if you are energizing the power supply at all. I would think that the power supply has got to have some kind of response when you turn the unit on.
Following is courtesy of www.7volts.com:
No boot, No video, No fans, No click
1. Check power to the system. Check outlet with lamp.
1. If no outlet power, problem is not with computer. Go to End
2. If there is power, go to 1B
2. Next check power supply. With an ATX sysem you can remove the power supply and get it to power up without a motherboard by shorting the green wire to black. There's only one green wire so it's easy. You can use a bent paper clip which will stay in place. If it doesn't spin up the fans, and it doesn't supply power, you have a bad power supply. (If the fans are bad, the power supply should still provide power even if it shuts down later) Go to 1,C. If the power supply starts when shorted but won't start when connected to the motherboard, you probably have a bad motherboard. Go to 1,D
3. Replace the power supply, it should take care of the problem Go To End
4. (Power supply works when green wire shorted but doesn't work when connected to the motherboard) Try the power supply with a different motherboard.
1. If power supply works, you have a bad motherboard Go To End
2. If it doesn't supply power, there's a problem with the connector on the power supply Go to End
Okay, you probably don't have a bad power supply. Check all wiring from the power supply to the motherboard and from the power-on switch to where ever it goes.
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/IMHO
//got nothin'
///this use to look better
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