Dell XPS 15 (L502X, Early 2011) - Manual (Page 9)

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This section provides information about
setting up your Dell XPS
laptop.
Before Setting Up Your
Computer
When positioning your computer, ensure that
you allow easy access to a power source,
adequate ventilation, and a level surface to
place your computer.
Restricting airflow around your laptop may
cause it to overheat. To prevent overheating
ensure that you leave a minimum of 5.1 cm
(2 inches) on the right and left sides. You
should never place your computer in an
enclosed space, such as a cabinet or drawer
while it is powered on.
WARNING: Do not block, push objects
into, or allow dust to accumulate in
the air vents. Do not place your Dell
computer in a low-airflow environment,
such as a closed briefcase, or on fabric
surfaces, such as carpets or rugs, while
it is powered on. Restricting the airflow
can damage the computer, deteriorate
the computer performance, or cause
a fire. 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.
CAUTION: Placing or stacking heavy
or sharp objects on the computer may
result in permanent damage to the
computer.
Setting Up Your XPS Laptop