Problems Connecting Macbook to TV

I'm trying to connect my 2007 MacBook to my CRT Sony Wega TV. I'm using a mini-dvi to video adapter. It doesn't matter if I use a yellow rca or svideo, the picture on my TV is all black and wavy. I can vaguely make out the picture on my TV, but it's mostly indistinguishable. I've tried changing the resolution settings but nothing fixes the problem. Can anyone help me with this?

All I have is RCA and S-Video. My TV is an old beast. I haven't upgraded yet. The adapter I'm using is supposedly designed for connecting to analog TVs like mine, but when I do all I get are black wavy lines moving across the screen.

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