1. You are running Vista or Windows 7 on a Macbook using bootcamp. It can be unibody/ Macbook Pro 13/ Macbook Pro 15 or any other screen size.
2. You have no audio/ sound. In macbook pro, you may also see a red light in your audio jack.
This might also be helpful if your are having a very low sound volume.
To Fix Simply follow the steps below
Download the Macbook Pro Cirrus Logic CS4206A Driver from our server. Again, do not worry if you are running Windows 7 or Vista. (As a request, please do not hotlink this file anywhere else or our server will automatically remove the file from server.)
UPDATE: For newer Macbooks, you might need a newer driver which is availble here
Incase the above download link does not work, google “CirrusAudio.10.6.1.zip”. We found another working mirror here.
Extract the right type of Driver (depending on your windows XP/ 7/ 32 bit/ 64bit)
This step is only for Windows 7 not Vista. Right Click on exe file of driver. Select Properties> Compatibility > Check run in compatibility as shown below. Select Windows Vista from drop down menu and Click OK
Double click the driver and install.
Run your favourite sound track because your sound is now working. You can also play the video below to test your sound