Two monitors (one, if you’re setting up a laptop), which may be flat-panel LCD monitors or CRT monitors or one of each—it doesn’t matter. You can even use a TV screen as a monitor. If you’re going to buy a monitor, there are many points to consider in addition to the price. For example, picture quality, screen size, screen resolution, compatibility with your computer port, higher contrast ratio, and richness of color are some of the most important factors.
Although we refer to two monitors in this article, you can use more than two as long as you have the connectors available on your computer.
Two monitor cables to connect the monitors to the computer (one for a laptop). These need to match the connection types available on your computer.
A monitor connection on your computer for each monitor you want to connect. These may be Digital Visual Interface (DVI) connectors, Video Graphics Array (VGA) connectors, HDMI (High Definition Multimedia Interface) connectors, or S-Video connectors for using your TV as a monitor. The connections will need to match the monitor cables. These ports connect to video cards in your computer. They are usually located on the back of your desktop computer and on the side or back of your laptop computer.
If you don’t have the connectors you need for your monitors, you can install a video adapter to change the connector type, or, if you’re using a desktop computer, you can replace your video card or install additional cards. This involves opening your computer, so you may want to seek assistance from a local computer retailer or watch this video for help to do it yourself.