|"Yes there is a yellow jack on the TV. The other two are white and red jacks."|
The red and white RCA jacks are for a mono audio input - L and R
The yellow RCA jack is for legacy composite video input.
The cable from the computer for that must connect to a port on the computer that has had the computer's video processed through a chip that converts the output to TV Out video to conform to legacy TV standards - either a RCA jack, or the RCA jack that's on a S-Video to RCA gender adapter that's plugged into a S-Video compatible port on the laptop.
A legacy composite or S-video display on the TV looks relatively crappy in comparison to a computer monitor's display, especially the text on the screen.
We don't have the SCART connector on TVs sold for use in North America, and in most if not all cases. ALL of the ports / jacks on the TV are for INPUTS, other than possibly a headphones jack.
If you can buy a SCART to VGA adapter, that will probably yield you a much better looking display on the TV than a SCART to S-Video (S-video connector) or composite video (RCA jack connector or RCA plug connector) adapter.
There is no such thing as an adapter for a TV made for use in North America that is old enough it has no VGA or DVI or HDMI port, or a set of three HDTV In RCA jack ports, for you to get anything other than a relatively crappy looking legacy composite or S-Video display on the TV.
The input source must be set to the proper source on the TV when you want to display the computer's video on the TV.