asus b450 i

I just recently finished building my gaming pc not even a week ago, and i had installed everything properly. I booted it up, and went into the BIOS to see if everything was there. But when I was about to install windows, I realized only one of my 2 m.2 ssd's were appearing. I proceeded to...

So I didn't know about the big nono that is swapping modular PSU cables. I don't know which one of the cables did it (maybe cpu) but now my mobo won't post. LEDs and Fans all run fine when I press the power button but no display output. (the motherboard has a few leds at the back and most of...