Question Stereo speakers not working

Sep 16, 2019
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Hi! today I bought a Logitech Z200 stereo speakers for my PC. It doesn't work. I've tried to plugged in every port but it suppose to be in ''rear'' if I'm correct. Tried many solutions and still don't get it to work. The speakers are fine, tried it on my phone and it work perfectly.

My pc is custom build by myself.
specs
CPU: I7 9700k
Motherboard: Aorus Z390 Pro Wifi
GPU: Gigabyte 2070 super oc
RAM: 16 gb
and so on...

Please help :3