CPU Fan issue

[Luvkraft]

So I don't do many tech forums, but you're one of my more respected youtube channels I watch, so I thought I'd ask you. I am in the process of building an emulator build. The current specs:

GA-78LMT-USB3 - AMD FX-8350 - Radeon RX-550 4gb - 16GB Ram Windows 10 Extreme Lite

I built a open air test frame, and had been running the system for about a month and half with a Radeon 1gb. I just purchased the RX-550 to replace the older GPU. I powered off everything and removed power cords and lines from the psu and MB. i then went in and removed the old GPU and put in the RX-550. After installing and plugging everything back in I noticed the CPU Fan did not come on as usual. The GPU, CPU, seem to be getting power. So I had a large CoolerMaster CPU fan, and tried to hook it up. Same effect, no power to the CPU Fan. the Bios and plugins are setup correctly, and the plug for the fans and on the MB seem fine, no burn or heated areas. So I wanted to know what else I need be looking for? Maybe something with the PSU itself or actual MB replacement? Weird thing is the old GPU required PSU plugin, RX-550 does not.

[mopman94]

Have you broken one of the pins for the CPU fan on the motherboard?