Sound on my laptop does not work

My laptop is LaViec C-LC500/2 which was made by NEC Company.  It have some Japanese key on the key board beside with English key.
I have already installed on it Windows XP-Pro and it can regconize all of device on it.  With sound device, It have a nice sound icon on the below on the right of screen.  however, I counld not understand the reason why it can not work properly.  There is no sound on it.
Thanks for your help.
Le Hoai Bao
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try update/reinstall ur sound driver
go to
look for optional hardware updates
good luck ;-D

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did research on google, end up goin into some japanese website
so check what's ur driver name by using this software
lhbaonetAuthor Commented:
First time, thanks for you answer.  But I have tried many another driver anh using 2 checking tool for hardware.  It show the same the result is correct the sound, AC 97 Audio-chipset VIA.
I have tried on Japannese website but I don't know Japanenese.
have you try update to latest driver from windows update site?

>>>AC 97 Audio-chipset VIA
if you having problem choosing one,
try using this combo driver,
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