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log on to internet and click on the link below
http://support.lenovo.com/en_US/research/hints-or-tips/detail.page?DocID=HT050904
then look for audio driver good luck!
Realtek High Definition Audio Driver
8ga116ww
6.0.1.6418(Windows 7/Vista)/5.10.0.6418(Windows XP)
L420/421/520
Click HereRead Me
You can download the drivers from the Compaq/HP WEBsupport/download page. Make sure you select your model laptop and the XP orVista Windows version of the drivers you require and install them. Click onthis link to download the drivers: - www.compaq.com/country/cpq_support.html
If You are using Intel Motherboard then visit the site , www.Intel.com\ where you get the required sound driver of the specified Intel motherboard or else visit www.realtek.com , thats it...
First download a small program called Unknown Device Identifyer Run on your laptop and click on the sound device hardward if there is one and Most of the drivers/software I get are from a web site driverguide.com you need
to fill out a free registration then search for the driver you need
download it in a format you can use install it and then most times
reboot the computer
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