|VGA on computers is also different than what a tv uses. Be sure the device converts if your tv is older.|
It might be easier to get a device that converts the video to a channel like channel 3 or 4.
I have seen some devices that can act as a secondary video card and output to vga from a usb device. There are also things like vga extenders
It is even sometimes difficult to get a new computer and new tv to hook up to correct settings with hdmi so you may have to do stuff like turn off and unplug tv to get stuff to reset correctly.
Might be easier to tell us what you have on the tv and on laptop. Also what region of broadcast.