EXPANSION PORT 3 on my HP Pavilion DV2000 Notebook.
I Googled for "Expansion port 3" because I want to display content from the Notebook on a digital TV (UK standard). I then joined Linux Questions.
So I need a connector lead from the port to the TV. What is that called?
The port supports the following:

1. USB 2.0
2. 10/100/1000 Ethernet
3. Consumer infrared lens (for optional remote control only)
4. Power inputs 65-W to 90-W maximum
5. Composite TV
6. s-video TV
7. Component TV
8. s/PDIF audio (select models only)
9. Headphone/speaker audio-out
10. Microphone audio-in
11. VGA
12. Power button
13. Volume control (up/down)
14. Mute/unmute status

It looks as if there must be a number of different leads to cover those!
I am based in the UK
Thank you

With all that stuff able to come out of one port, it sounds like a docking station connector!

As for a single cable going from the laptop to a TV, it would likely be VGA (15 pins, squarish shape) or S-Video (4 or 9 pins, round like a PS/2 plug). It could also use a composite/RCA-style wire (round, one pin) to a TV, depending on the computer.

EDIT - then again, in Europe don't you guys have SCART connectors too? I'm not familiar with them, because we don't have them in Canada, but SCART supports a whack of data modes. Perhaps tell us what this connector looks like?

Is THIS it?

It sounds like it is a docking port, but it actually turns the notebook computer in a desktop. Go to HP site and find the accessories for your model.

It is either S-Video or Composite (phono) that you want to use for the TV.

Though the setup will depend if the video module (driver) supports output to a TV. nVidia graphics are the easiest. ATI is a little hard. Intel will be the hardest.

Depending where you live, use PAL and either a TV refresh rate of 50 or 60 hertz.