You may have to adjust your monitor settings. That connections on a lot of laptops is not live unless you turn it on. Usually a laptop is just defaulted to the built in LCD display.
Some times one of the "F" number keys at the top of the keyboard will toggle between the LCD and the external SVideo connection, and/or leave them both on.
Check your owners manual.
Some times one of the "F" number keys at the top of the keyboard will toggle between the LCD and the external SVideo connection, and/or leave them both on.
Check your owners manual.