Headphone doesn't work when plugged in.

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Hello, I have Acer Aspire ES 14 laptop. I bought it last November 19, 2015. The speakers works well but when I plug in my headphones, it doesn't work. And my headphone is working perfectly fine on my phone. When I go to playback, the headphone doesn't show up. I also already updated Realtek but nothing works! :-( help.