you will need to connect the audio cable where you have one audio connector at one end and a dual connector at the other end.
Connect the single connector to the audio ouput of the pc and the dual connector to the audio input on your TV screen.
although some newer pc's just have single connectors each end, its usually a light green colour the green end goes into the green slot on the back of ur PC and the other end goes into the back of your tele which should say either audio in, or RGB or both!
hope this helps dude