I have a Sony Bravia KDLV4000 and am trying to

Hello Amy

I will see if I can sort you out.
On the back of your Sony Bravia. You should see a port labelled AUDIO IN it is normally located next to the PC IN port You have got plugged in already. All you need to purchase is an audio cable to connect from your labtop (audio out/speaker) to your Tv (audio in).

Hope this helps you out.

Cheers Little Dish Fitter

You will need a second cable from the headphone socket on the laptop to the audio in on the tv.if it doesn't have an audio in then you need a scart to 3.5mm stereo jack lead to hear sound.