You have to use a 3.5mm to dual (L/R) RCA cable.
Note S-video will only display video and no audio. So, you will need to connect the audio cables similar to other AV components like DVD players.
In addition to above steps :
Basically there are two things to remeber.
1. The video signals should be detected by TV automatically. If not, then we need to force the TV detection
2. Video plays only in one monitor, that is in primary monitor. So, we need to make the TV as primary monitor.
Navigate, Display->Settings -> Advanced ->Displays
Select TV as start, and select laptop monitor as stop (toggle with power-on/off icon for both these options).