VGA 轉色差的reliability?

Several days ago, I bought a VGA to 色差cable in Apliu Street, it lnever works thereafter. Fortunately I could get back my money, although not much but it was troublesome to do so!~~

I would like to ask if I could buy a reliable one from somewhere.

唔得, 根本signal唔同, 唔可以單靠一條線黎轉
如果display card本身有tv out, 就用tv out啦