Dell Latitude C540 - Manual (Page 16)

Video Connector
Connects an external monitor. See " Using the Display ."
AC Adapter Connector - Attach an AC adapter to the computer.
The AC adapter converts AC power to the DC power required by the computer. You can connect the AC
adapter with your computer either turned on or off. For more information on the optimal and allowable AC
adapter configurations for your computer, see "
Ensuring Sufficient Power for Your Computer " and " Docking
Power Considerations ."
CAUTION: The AC adapter works with electrical outlets worldwide. However, power
connectors and power strips vary among countries. Using an incompatible cable or
improperly connecting the cable to the power strip or electrical outlet may cause fire or
equipment damage.
NOTICE: When you disconnect the AC adapter from the computer, grasp the adapter cable
connector, not the cable itself, and pull firmly but gently to avoid damaging the cable.
Fans - The computer uses internal fans to create airflow through the vents, which prevents the computer
from overheating.
NOTE: The computer turns on the fans when the computer gets hot. The fans may make noise, which
is normal and does not indicate a problem with the fans or the computer.
CAUTION: Do not block, push objects into, or allow dust to accumulate in the air vents.
Doing so can damage the computer or cause a fire.