help with newish tv

[Grey!matter]

Hi

we just got a tv from a friend (samsung ln40a330j) and I just hooked it up and the sound is fine. However, even though I have picture(looks pretty good) there is a lot of noise(?). I have gone through most of the options and i simply dont know what i need to adjust. The imgur link shows what im talking about. Also, this isnt just for cable this is happening for movies as well.

thanks

http://imgur.com/QTrJeVb

 

[Grey!matter]

fixed it(I guess), The problem is the coaxial input on the back of the tv is messed up and as soon as I switched to a hd cable box and used hdmi it was fixed.