After assembly, tried to power up. Nothing.
So tried the PSU paperclip test. Voila! PSU is functioning.
Note: Used a Rosewill 850w PSU for this (have since gotten nervous about a Rosewill unit, shipped it back and ordered the Corsair TX750 as replacement).
So what are the next step(s) to troubleshoot this process?
Assembled the rig as per a Tomshardware doityourself tutorial.
a) Had both the ATX 12v (8pin) and ATX main power leads firmly attached.
b) Got the case switches attached..
God, I'm hoping the MOBO's not DOA, as it took forever to get it installed.