Should you have software like Realtek's HD Audio Manager, try disabling jack detection and see if that helps.
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Newer motherboards come with numerous ports for surround sound, so you might need to hit up the manual for more details. Mix those two up, and nothing at all will happen. Is it plugged in? Have you utilized the correct port? For 3.5mm jacks, it's generally green for output and pink for input, depending on the available sound card.
Source: Windows Central (Image credit: Source: Windows Central) Make sure you use the right ports The most important factor in sound quality will be the soundcard on your motherboard, comparing it against a dedicated digital-to-analog converter (DAC).