User Guide - Windows 7

Bottom
Component Description
(1) Docking device receptors (2) Connects an optional docking device.
(2) Vents (2) Enable airflow to cool internal components.
NOTE: The computer fan starts up automatically to
cool internal components and prevent overheating. It
is normal for the internal fan to cycle on and off during
routine operation.
12 Chapter 2 Getting to know your computer