Put new fan in, PC won't boot.

nerveva03

Honorable
Aug 6, 2013
1
0
10,510
After being on this pc for 6 months, I wanted to swap out one of the fans, so I did. After leaving it off overnight (i did not test it the night i did it), i woke up and turned it on, i waited for a couple minutes to see if it would boot on my monitors, which it did not. I tried to switch the new fan with the fan i had previously, but IT STILL WILL NOT BOOT. I know the PSU works and I know every component in it works, but why won't it just fucking boot?