Laptop won't use headphones

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Hello,

My laptop doesn't detect or understand that I've plugged my headphones in, and continues playing audio through the main speakers. I'm on a Dell G3 17 and I think windows 10, I've tried using the control panel and looking for "RealTek HD Audio Manager" but I don't have one. What do I do?

System Configuration: Windows / Chrome 77.0.3865.90
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