Xbox 360 Help

When i plug the HD pc cable into my tele from my 360 i get a really good picture but no sound.
Then if i use the scart cable one instead i get a crap picture (but with sound)
How ama gonna gets me some sound and still play it hd ?
Problem only just occurred 'cos on my old tele it was connected to my suround sound but i gave that to my dad and i don't have room for suround sound in my room really anyway lol.
Moved by PaulMacC (Forum Moderator) from Console Gaming to Microsoft as it is more relevant here.

swap the 2 red plugz.. that happened to me kinda

You get like

Yellow
Red
White

On one of them other one is like

Green
Red
Blue


you might of used the wrong red.

Are you talking about the HDMi cable? I haven't had problems with, just check the connection and make sure it's in the HDMi input correctly.

I didn't get no sound either so I connected a speaker to an amplifier and used that for sound for my Xbox.

Is the flick switch thing on HDTV and not TV?

swap the plugs around

Take the casing off the scart and use them both and use scart as sound, its what i do

It's not the one with 6 cables it's the one that just has 2 and a pc 1 ?

If its a chunky plug thing then take the case off