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I seem to have found a temporal work around just in case anyone is facing the same issue.

 

Mine is HP ProBook 450 G6 running Windows 10 build 10240 and the problem is sound goes after waking up from sleep mode. Disabling and enabling the High Definition Audio Controller  under System devices in device manager seems to bring the sound back. This is temporal while I wait to update to a more latest windows 10 version which may hopefully clear this issue.

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