How to Display Your Computer Screen on a TV. You can display your computer screen on a TV if your video card and PC have a TV-out port. Here's how:
Turn off your computer and TV and disconnect the power supply for each.
Connect your video card's S-video port to the TV's S-video port. If your TV does not have an S-video port, connect your video card's S-video port to the composite video-in port of your TV through a video-out cable and a composite video cable.
Switch on your computer.
Go to your operating system's control panel.
Double-click on the "Display" icon and open the "Display Properties" window.
Click on the "Output Device" tab. If you can't see this tab, go to "Settings" and click "Advanced." Then, select the "TV" tab.
Enable video on TV by clicking on the "Enable Output to TV" button or "Output Device: TV." Your computer screen will go blank. Retain that setting. You can now use your TV as your computer's monitor.
Things You'll Need
A composite video cable
Some TVs have a VGA cord and port. In such cases, you can simply remove the VGA cord from your computer's monitor and connect it to the TV.