This is my first computer build so I'm not sure what could've gone wrong.
Here's what I did:
Installed the processor
Cleaned and added new thermal compound (Artic Silver Thixotropic Premium Thermal Compound)
Installed the stock heatsink
Removed extra standoffs
Installed the motherboard and connected the front panel I/O
Installed the PSU
Installed the harddrives
Installed the RAM
Installed the CD/DVD burner
Tried turning the computer on just as a smoke test. It turns on, but not even for a half second.
I installed NVIDIA GeForce 7800 just to see if that affects it, and it stayed on longer by a half second.
When it's on, the fans work and the lights all go on. I don't hear the HD start spinning, but that might just be because it's only half a second.
I've been pretty careful with handling everything. I've kept the motherboard inside an anti-static bag before installation, and had it on top of the bag as I installed the CPU/heatsink.
I've worked with an anti-static wristband attached to my steel pocket knife (so I can move more easily).
Here's what I bought:
LIAN LI Lancool PC-K58W
Intel Core i5-2400
GIGABYTE GA-H67MA-USB3-B3 Micro ATX Intel Motherboard
Rosewill Green Series RG530-S12 530W
G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM
Would it be a DOA motherboard, PSU or did I forget to do something?