Macbook 2,1 Built In Sound Stopped Working after Snow Leopar

Hi,

I have a macbook 2,1, the white one. Has anyone else had their regular built in sound just stop working right after upgrading to snow leopard? I can get sound to play through headphones, but once I up plug them the little sound icon in the menu bar will grey out and I will not be able to get sound to play through the internal speakers.
If I go to the Sys Pref > Sound > Output Pane, it will say "The selected device has no output controls" in the Settings for Selected Device section.
Any help would be great!!! I upgraded my girlfriends laptop to Snow Leopard even though she could care less. Now she's all mad cause the sound doesn't work.

Please help.

I didn't find the right solution from the Internet.

References:
https://cnet.co/2vkqPI0
Animated Device Explainer Video

Thanks