I am using IBM 8123Q2W. Earlier there was XP OS. now changed to Windows 7. I am not getting sound through external speakers or

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Apr 15, 2014
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I am using IBM 8123Q2W. Earlier there was XP OS. now changed to Windows 7. I am not getting sound through external speakers or through earphone/ headphone jack. What to do?
I have not installed any separate audio/ video cords, depending on OEM provided software and hard ware. Which drivers to be installed or what else to do please inform on mailtoprofessional@yahoo.co.in