How to Connect An Xbox 360 to Your TV
By Eric Qualls, About.com Guide
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Xbox 360 Power Supply
Now that you have the audio/video cables connected, the next step is to hook up the power supply. Connect the two parts as shown in the picture and then connect the "power brick" end to your Xbox 360 and the other end to a wall outlet. The big power brick needs plenty of ventilation just like the main system so try to have an open space on a shelf for it. It is not recommended that you set it on the carpet.