Sorry, I wasnt clear.
Your BIOS is a blue screen. I get to mine by hitting delete when my puter is booting. It takes you to a set up type of screen. I think is says either CMOS or BIOS at the top. There you should find all the settings for the hardware in your puter. Be carefull what you hit. But don't worry about messing it up either. Can be undone. Check there for the sound option, its a on/off selection.
See if that helps.
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Frank
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