Iam using a lenovo notebook 3000 g430
the problem could either be the port or your headphones. try to check if your headphones are working on a different computer; if they are, try hooking a set of external speakers on the audio port of your g430. if you don't hear any sound from the external speakers, then the problem is with the port itself. check if your computer is within warranty; if it is, contact lenovo technical support
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