Hy! I have changed my motherboard ,and i only hear the right speaker , the balance is ok , i tried different audio drivers ...if i pull the jack a little i heard them both , but i only can listen music on youtube , if i try a game it says that i don't have a sound card ... Pls help ! I forgot to say that i tried two 2.1 systems , two headphones and one 5.1 ... nothing ... same only right