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My machine does not recognise Headphone

oddbenkoddbenk Member Posts: 28 Troubleshooter
Machine.: Predator Helios 300 PH315-52-72S6
Bios Ver.: SMBIOSBIOSVersion - V1.06

When I plug my headphone in, the machine does not recognise  it. I can't change the speaker output. nothing. any help? Oo
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