Thank you for your replies, and I apologize for the time between responding.
I am still dead in the water, and things are not looking good to me. Here is what happened since my original post.
The evening of the original post, I opened the case to check things out (dust, cables, etc) Nothing seemed out of place, but I cleaned it out a bit. In exploring possibilities, I inadvertently turned the PC on by hitting the PWR1 button directly on the motherboard. I figured all was well (maybe a power button issue?) and let it be. The next time I shut down completely (no more hibernation) it never came back on. Now, when I push the power button, nothing happens at all, not even that PWR1 button on the motherboard.
So far, here is the extent of my troubleshooting;
1) Turned off PSU, reseated power cord.
2) Unplugged all extra devices (USB ports, external HDDs)
3) Pulled out the CMOS battery to reset
Now, when I turn on my PSU, it has an LED light on the switch that does come on, and the status lights of my motherboard do work. My board has 4 lights; light 3 is constant on (normal) and the 4th sometimes blinks rapidly (as in original post). I found a PDF of my motherboard manual, and it references 2 status code lights (LED1, LED2). In looking at my board, lights 1 and 2 are labeled LED1 and LED2, while lights 3 and 4 (the ones lit and in question here) are not talked about in the manual.
I dont have extra components to test pieces of my build, but the fact that the PSU and Motherboard both show that power at least feeds to them is slightly reassuring. I had thought about the power button, and the possibility that the wiring connection may have moved or such, but that wouldnt explain how pressing the PWR1 button directly on the board doesn't work anymore.
Thank you for your continued advice!
~Compagent