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Rxguy, I suggest you verifying the motherboard documentation for expected behaviors during troubleshooting; usually you should get some kind of LED or beep activity when the unit is turned on without memory or graphics. Testing the system with minimum components and out of the chassis is also advised.
If you have replaced the motherboard and both power supply cables are connected, and there is no sign of activity other than the one you have described above, I would assume this would be a bad processor. You may contact your local Intel® support if needed.
The previous board that functioned for 24 hours did not do this cpu fan stuttering when it started, also there was a single beep when i first built it, signifying a good POST.
This one does not post, without any components installed or with all installed.
I just took it down to a local shop, and they're going to test the chip in a known functioning board to determine for me if the chip is indeed bad. thanks for your comment