Output video via firewire/ilink?

All I know is that some video editing apps, especially professional ones, do allow FireWire video output, because it allows you to send video back to a deck or camera. I don't know exactly how it would work from the sources you haven't named (DVD? iMovie? iTunes videos?), or if that's what the TV expects. You might try asking in the Final Cut forum.

Oh, I see, just to use the computer itself. I guess you could try, but now I think that jack on the TV is probably for playing video back directly from a FireWire video camera, of which Sony sells plenty.

S-video is just a bit above NTSC video. It is not high-resolution by today's standards. You can probably do better than S-Video, check the other ports on the TV.

A VGA port will provide much more resolution than S-Video. It might be labeled RGB. VGA is what we used to use to plug in an analog CRT computer monitor. You can send VGA video from your PowerBook with an adapter that probably came in the box. Get a VGA cable and connect the adapter to it.

A DVI port, if your TV has it, will give you the best and sharpest image of all. Some high-end TVs have DVI input. DVI is the all-digital standard currently used to drive the high-resolution LCD computer monitors sold by Apple and others. You have a DVI port on the side of your PowerBook; you just need to buy a cable.