What type of computer? (Make and model, operating system, etc.) What type of TV? How is the computer "hooked" to the TV? Generally, the best way to connect a computer to a TV is through an HDMI cable which carries both sound and video. Did you do that? If the desktop doesn't have an HDMI port, think about installing one.
What are you trying to do with the connection? Are you playing video games on the computer and displaying them on the TV? Playing DVD videos on the computer? Something else?
Hope this helps and let us know more.
Although I have entered the newbie forum i feel its where i belong, had a pc since 1989 & before cpc464!! my question in i have hooked my desktop to my main tv, but the sound of silence is now wearing thin, it's either that or the missus going on & on & on & on, actually i should ask her about this cos she seems to know everything else, but seriously, even headphones dont make a sound