Things You'll Need
Instructions
Turn off and disconnect the power source of your Xbox 360. Be sure that no other accessories are plugged in.
Disconnect the video cable from both your Xbox 360 and TV. Ensure that your TV is off beforehand.
Attach the VGA cable. One side of the cable (AV connector) is designed only for your Xbox 360, while the other side (VGA connector) is strictly for your PC monitor. These are easily distinguishable as the AV cable is larger and fits snug into your Xbox 360, while the opposite is true for the VGA cable.
Connect the red and white audio wires to the audio input on your monitor.
Connect the power supply to your Xbox 360. Turn on both the game system and TV.
Select your resolution. Go into the console settings from the main menu of your Xbox 360, and select "Display." Choose the resolution that best fits your monitor.