LCD computer monitors are capable of displaying both analog and digital video signals. Analog signals have a maximum resolution of 480p, which is a standard definition resolution. Digital signals on the other hand have a maximum resolution of 1080p, which is true high definition. If you want to change your LCD monitor over to a digital display in Windows XP Professional, you'll need to use a DVI cable. Your LCD monitor should have come with one of these cables.
Difficulty: EasyInstructionsThings You'll Need:DVI cable1Locate the DVI cable that came with your LCD computer monitor. The plugs on the end of the DVI cable are white, as opposed to the plugs on the end of a VGA cable, which are blue.
2Connect the DVI cable to one of the white outputs on the back of your Windows XP Professional computer.
3Connect the DVI cable to one of the white inputs on the back of your LCD computer monitor.
References DataPro: All About DVI