Watching videos on external TV with laptop monitor off?

Hi,
I'd like to view some of my iTunes videos on an external TV but with my G4 Powerbook's monitor off. (Watching full screen videos in full screen mode on the laptop itself tends to produce intense heat and resulting fan noise.)
I connected the laptop to the TV with an s-video cable, and I can view windowed video in dual-monitor mode or full screen video in mirrored mode with both displays showing the same thing...
...but is there any way to just watch it on the TV with the laptop simply sending the video out and not displaying it locally?
Thanks!

Hi,
Thanks for the reply. Yes, in the end, I hooked up an external USB mouse in addition to the s-video and power cables. That does allow the laptop to operate with the lid closed and display everything on the external monitor.
Alas, my hope that this would allow me to view iTunes videos without the heat and noise normally associated with full-screen viewing didn't pan out. Maybe time for an upgrade.

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