Dell Latitude D620 - Manual (Page 4)

The green lights located above the keyboard indicate the following:
volume control buttons — Press these buttons to adjust the volume.
mute button — Press this button to turn off the volume.
Left Side View
air vents — The computer uses an internal fan to create airflow through the vents, which prevents the computer from overheating.
security cable slot — Lets you attach a commercially available antitheft device to the computer. For more information, see Security Cable Lock .
audio connectors
Turns on when the numeric keypad is enabled.
Turns on when the uppercase letter function is enabled.
Turns on when the scroll lock function is enabled.
1 air vents 2 security cable slot 3 audio connectors (2)
4 infrared sensor 5 smart card slot 6 wireless switch
7 Wi-Fi Catcher™ light 8 PC Card slot 9 hard drive
CAUTION: Do not block, push objects into, or allow dust to accumulate in the air vents. Do not store your Dell computer in a low-airflow
environment, such as a closed briefcase, while it is running. Restricting the airflow can damage the computer or cause a fire.
NOTE: The computer turns on the fan when the computer gets hot. Fan noise is normal and does not indicate a problem with the fan or the computer.