NEWS! And you're going to LOL when you read this.
I was fiddling around inside the machine and decided to remove the CPU and HSF. I cleaned the HSF and put them all back in. Obviously not wise without a new coat of thermal, but w/e. As I properly clipped the HSF in, I notice that the 12v connector from my PSU is not connected to my motherboard!!!!
What I must've done is whilst resetting the CMOS, somewhere in between I must've disconnected all the cables and put it back together again and forgot the 12v connector! Now I boot up and things happen onscreen. YESSSSSSS. VICTORY IS MINE.
Reset all the BIOS settings, and F10'd it. Boots up and gets to POST, and it doesn't boot to OS, because the HDDs have some sort of error now. I make sure they are properly connected w/ master slave all proper, and its kinda not booting

. I think what's happened is my HDDs have become corrupt/damaged. Any help with that?