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So, I ordered a bunch of parts and put them together. They should all be compatible.

My power supply unit is not faulty. It works fine when I plug it into my other system. It does not work in my new system. The PSU from my old system does not work in my new system either.

Everything is connected correctly. POWER SW, RESET SW, 24 Pin, 8 Pin. I've checked, double checked, triple checked, and repeated that process roughly 20 times.

The only other thing I can think of is that it may be due to my motherboard not being fully secured to the case. The case gave me a diagram for ATX boards and MATX boards (My board is a micro atx), so I put standoffs in all the MATX holes. However, two of them to the far right did not have a matching screw hole on the motherboard, so I removed them from the case and left the holes empty.

Other than that, I'm completely clueless.

EDIT:
PARTS:
i3-2100
ASRock MB-Z68MU3 LGA1155 MATX Motherboard
G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 1333MHz DIMM

Some pictures:
On the right of the P LED is the POWER SW 8 Pin
24 Pin

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1  
What parts are you using? We can't do much if we don't know what parts these are –  Simon Sheehan Feb 22 '12 at 0:17
    
Also needs more details as to what you mean by "not powering up" -- is the power supply not turning on, are you getting no video, etc? –  Garrett Feb 22 '12 at 0:25
    
Power supply is not turning on. No fans spin, nothing lights up, no interesting sounds. Nothing. –  Rob Feb 22 '12 at 0:27
    
You may have missed the connection that goes from the ON switch to your motherboard. –  Simon Sheehan Feb 22 '12 at 0:35
    
@SimonSheehan Are you referring to the POWER SW? Got that. –  Rob Feb 22 '12 at 0:36

1 Answer 1

up vote 1 down vote accepted

Figured it out. An extra standoff was shorting out the motherboard. I've removed it and it all works perfectly. Thanks, guys.

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That's interesting. How did you finally detect it? Was it sparking or something visual? –  jdh Feb 23 '12 at 4:11
    
@jdh, while I was reading around about what the problem might be online, I saw it was a fairly common problem. So, I removed the other side plate of my build, counted the standoffs and then counted the screws in the motherboard. Saw there was an extra, so I popped off the motherboard and pulled it out. Put it all back together and booted it up fine. –  Rob Feb 23 '12 at 13:39

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