I've tried plugging in two different fans in my motherboard but they just wont spin. I have a gigabyte b450m ds3h and there's only one port for a fan other than the one for the CPU fan (which works fine.)
Well....if you don't know that either fan ever worked, I'd assume both are dead and gone................barring further information. You can buy a new fan for 10 bucks or less. There is some small chance the connector on the board has gone bad, but that wouldn't be my first guess.