In the case of using win7, the rear panel headphone jack may be used, and the front panel headphone jack cannot be used. Now the following one A solution to see if it is useful to you.
First open the “Control Panel” and find “Realtek High Definition Audio Manager” from inside.
Re-open “Realtek High Definition Audio Manager”
Open “ jack settings & rdquo; this folder
will appear "jack settings" dialog box
will "disable the front panel jack" check Can
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