I also have a suggestion. I dont know why this happens, but its happened to me in the past. Unplug your IDE cables and see if it boots. You should hear the drives spinning up. For some reason, if you have the IDE cables connected wrong, the machine will hang. If that doesnt work, here is the process I use to troubleshoot
Unplug everything. No PCI cards, No reset switch, pc speaker, LED wires, IDE cables, USB, etc. Only whats necessary to post (cpu, memory, video card, power supply and the power button). If it posts, you can now start adding one piece of hardware at a time until you find the culprit.
The folks up there also were dead on about the standoffs. if you did not use plastic or brass standoffs, you are most likely shorting out the mobo to the case. the best way to test this is to remove the mobo from the case and set it on the floor (on top of the static bag it came in) then hook it up outside the case. You can then try to power it up and see what happens.
Good luck! This happens to everyone (even seasoned veterans of pc building) so dont give up and keep trying!
Mike
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Mike
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