How Can I Fix My Laptop Sound Card/audio So It Works Without Having To Apply Pressure To The Laptop?

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I'm having some trouble with audio on my HP Pavilion zv5255us laptop.
The sound card/audio does work so I know it's not a problem with the drivers, but I can only get sound when I apply pressure to the laptop, usually near the headphone jack. This happens when trying to listen through the speakers and through headphones. I've recently bought a Turtle Beach Audio Advantage Amigo to help the situation and it does work perfectly with headphones but I don't think there's a ...
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