Dell Latitude D420 - Manual (Page 4)

If the computer stops responding, press and hold the power button until the computer turns off completely (which may take several seconds).
Left View
security cable slot — Lets you attach a commercially available antitheft device to the computer. For more information, see Security Cable Lock .
headphone connector — Lets you connect headphones or speakers to the connector.
microphone connector — Lets you connect a microphone to the connector.
PC Card slot — Supports one PC Card, such as a modem or network adapter, or a 34-mm ExpressCard in an adapter. The computer ships with a plastic blank
installed in the slot. For more information, see Installing a PC Card or 34-mm ExpressCard .
smart card slot — Supports one smart card.
Secure Digital memory card slot — The Secure Digital memory card slot supports one Secure Digital memory card. Use Secure Digital memory cards to save or
back up data.
audio connectors
Right View
NOTICE: To avoid losing data, turn off your computer by performing a Microsoft® Windows® operating system shutdown rather than by pressing the
power button.
1 security cable slot 3 headphone connector 5 SmartCard slot
2 microphone connector 4 PC Card slot 6 Secure Digital (SD) card slot
NOTE: The computer turns on the fan when the computer gets hot. Fan noise is normal and does not indicate a problem with the fans or the computer.
Attach a microphone to the connector.
Attach headphones or speakers to the connector.
CAUTION: Do not block, push objects into, or allow dust to accumulate in the air vents. Do not store your 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.