If you are having the latest batch of Compaq Notebook.

read the below:
How-to: Connect an HP notebook (with NVIDIA GPU) to an HDTV!
Basically, the recent notebooks (at least the consumer ones) that have Nvidia graphics processors have a special TV plug, that at first glance looks like an S-Video port. If you look closer at the plug, however, you'll notice it has 7 pins instead of the 4 in a standard S-Video port. If you have a business model or a non-current machine, just take a look at that port. If there's only 4-pins then sorry, this doesn't apply to your machine. If it has 7-pins, congratulations! You have an unadvertised, nearly free HDTV component output port.

http://forum.notebookreview.com/showthread.php?p=1931712