So sometimes you have a fan in your parts box that was pulled from something that previously worked. It uses a normal 3 or 4 pin fan connector but when you plug it is nothing works. The issue is some non-PC devices seem to use a reverse polarity configuration compared to PCs. The fix is push down the locking tab on the crimped pins. Once you get the locking tab down you can gently pull the wire out. Then carefully lift the locking tab up and reseat the pin in the correct spot.
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https://www.youtube.com/watch?v=9DS1Asen0M4