When connecting my MacBook Pro Late 2010 to my Samsung TV Monitor via HDMI there is no sound coming out, only picture. Alternatively when I'm using my dual-boot Windows 7 installed on the same machine the sound works as it should via HDMI on my TV monitor.

I have tried everything and have concluded that it's a built-in option that is not available in this version of the MacBook Pro Late 2010 (7,1).

Is there a way to fix this issue without needing to buy additional hardware?