Audio/visual devices can connect to televisions using a number of signal cables, including RCA cables. In the event that you want to connect your audio/visual device to another display, such as a computer monitor, you must find a way to convert your RCA signal into a VGA signal: the signal accepted by all computer monitors. To convert this signal, you must construct your own RCA-to-VGA converter cable. As long as you have the right equipment, you can do this easily.
Connect one end of your RCA cable to the RCA port on the converter box.
Connect one end of the VGA cable to the VGA port on the converter box.
Test your new converter cable by connecting the RCA ends of the cable to your audio/visual device and the VGA end of the cable to the VGA port on the back of your computer monitor.
Turn your computer monitor and audio/visual device on. You should see the signal from your device on your monitor.