I have an HP Pavilion g6 Notebook PC, Product number: A4G31AV and recently ungraded to Windows 8.1 Pro. However, it seems no matter what I do I can't get the internal Altec Lansing speakers to work again. I have other externals plugged in that work, headphones and small bookcase speakers through the headphone jack, bit disconnected no sound from the built in speakers.
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