Acer Aspire 5253 Laptop speakers suddenly stop working after a few minutes. I go into the sound control panel and change the default sound device from Conexant High Definition Audio speakers (the internal speakers that suddenly stop working) to WsAudioDevice_383S(1) then immediately change them back to Conexant High Definition Audio speakers, then the speakers will work for a few minutes again. I have updated the drivers, tried to change settings in sound properties but still having the same problem. Any ideas?