I found a
download page for the 9410 User Guide. According to the guide, holding down the Fn key and tapping the F5 key will toggle between the built-in display and external monitor. I am not sure if it is for the VGA output only or also for the S-Video output. You may have to go into the Windows display properties control panel and specifically enable the S-Video output to run either NTSC or PAL configured video.