after upgrade operating system from xp to vista or win7, Dell Vostro 1400 has No Sound on Win7,how to fix dell vostro 1400 no sound, first you have download sigmatel stax 92xx for win7 or search on google download sigmatel 6.10.0.5414 for win7, when you see on device manager, audio device from win7 ( hd audio ) the internal speaker must be no sound < just update it or re instal than restart your OS than sound back again,
