I think you need to in this order
1) plug s video into tv
2) plug s video into laptop
3) turn on tv
4) turn on laptop
5) go into display proerties and look for an option to change from monitor to TV
You have to have the TV plugged in and on so that the laptop detects it during boot
On my Toshiba laptop (S3 Graphics SuperSavage chip), I
don't think you have to worry about timing (as to what
gets turned on first anymore). But I haven't tested
that empirically.
1) Plug the external display into the appropriate port
(e.g. TV to the S-Video, or external monitor to the back
VGA plug). Turn the external display on.
2) Go to your desktop, right-click and go into Display
Properties. Switch to the "Settings" tab, click on
"Advanced" button.
3) On the S3Display tab, you can then pick which devices
you want to use in combination (you can pick up to two).
Most other modern graphics drivers should have a similar
control panel.