Dell Latitude D820 - 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
security cable slot — Lets you attach a commercially available antitheft device to the computer. For more information, see Security Cable Lock .
air vents — The computer uses an internal fan to create airflow through the vents, which prevents the computer from overheating.
IEEE 1394 connector — Connects devices supporting IEEE 1394 high-speed transfer rates, such as some digital video cameras.
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 security cable slot 6 infrared sensor
2 air vents 7 wireless switch
3 1394 connector 8 Wi-Fi Catcher™ light
4 audio connectors 9 PC Card slot
5 ExpressCard slot 10 smart card slot
NOTICE: Before you buy an antitheft device, ensure that it will work with the security cable slot.
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.