I have an Acer Aspire One Notebook PC (laptop model #KAV60) that has lost is audio. How can I restore it? Thanks

If you select your model from this list it will detail the available drivers for your machine:

Acer Drivers link: Acer Support: Downloads & Support Documents

Ps oh yeah a quick look shows that the KAV60 is also know as AOD250.
Also it is a NETbook not a NOTEbook..