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if your computer came with
a motherboard disc the sound drivers could be on it
click start control panel
administrive tools computer management device manager scroll to sound video and
game controllers you might see a yellow question exclamation mark? ! or a red X
Right click to reinstall drivers if you don
Sigmatel AC97 audio driver 5.1 for the STAC 9750 on Windows Vista, XP and 2000
Description The Sigmatel AC97 audio driver is for Windows Vista, Windows XP or Windows 2000 (used in lots of Dell, and other brand, pc models). Technically, it is the rather long winded:
Sigmatel C-Major STAC 9750 AC97 WDM Audio Driver.
Whatever way you to label it, the driver package installs version 5.1 of the driver onto your system and can be used as an update to an earlier driver or as part of a new installation.
You are NOT alone! There are a lot of folks trying to correct this issue. I have been somewhat successful, but not always. The last 'fix' is a VIA download that is supposed to work with all AC97 cards. I had the same issue with the computer I am writting this from, and the sound is working once again. So try the download at: http://www.download.com/VIA-Vinyl-AC-97-Codec-Combo-Driver/3000-2120_4-10163027.html
And PLEASE let me know if it works or not. The more information I can gather, the more I can help.
You try to connect self powered extenal speakers and see how it responds. whether it works or not this suggests that the drivers could not be correct ones - where possible it is good to continue searching for correct drivers and will get back to you soon.
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