Q: Integrated speakers not working on MacBook 13" 10.5.8

Hi, Revoluzion.  

Thank you for visiting Apple Support Communities.

Here are a couple troubleshooting articles that I would recommend going through when experiencing this issue.

Intel-based Macs: Resetting the System Management Controller (SMC)

http://support.apple.com/en-us/HT201295

Resetting PRAM

http://support.apple.com/kb/PH6478

If the issue persists, I would recommend going through the steps in the article below.  After all steps have been processed see step 5. 

Troubleshooting issues with no audio from built-in speakers on Macs

http://support.apple.com/en-us/HT203186

Cheers,

Jason H. 

Revoluzion, 

Thank you for your response.  Since the troubleshooting steps did not resolve the issue, I would recommend reaching out to us via the article below to further assist you with this issue.  

Contact Apple for support and service

http://support.apple.com/kb/he57

-Jason H.