ACER travelmate 4150 s-video to plasma tv

Hello,

i would appreciate if anyone can assist to get my travelmate 4150 connected to my plasma tv using the s-video(7-pin) to RCA. i have done all the settings to attach the tv but nothing comes up on the tv. is there anything to do with my graphics card (nVidia). i also used the serial cable to RGB, which is also not working.

thanking in advance.