Dell Dimension 4500S - Manual (Page 9)

S a f e t y I n s t r u c t i o n s 9
• To help protect your computer from sudden, transient increases and
decreases in electrical power, use a surge suppressor, line conditioner,
or uninterruptible power supply.
• Be sure that nothing rests on your computer’s cables and that the
cables are not located where they can be stepped on or tripped over.
• Do not spill food or liquids on your computer. If the computer gets
wet, contact Dell (see page 84).
• Do not push any objects into the openings of your computer. Doing so
can cause fire or electric shock by shorting out interior components.
• Keep your computer away from radiators and heat sources. Also, do not
block cooling vents. Avoid placing loose papers underneath your
computer; do not place your computer in a closed-in wall unit or on a
bed, sofa, or rug.
When Working Inside Your Computer
Before you open the computer cover, perform the following steps in the
sequence indicated.
CAUTION: Do not attempt to service the computer yourself,
except as explained in this guide and elsewhere in Dell
documentation. Always follow installation and service
instructions closely.
1 Perform an orderly computer shutdown using the operating system
menu (see page 22).
2 Turn off your computer and any devices.
3 Ground yourself by touching an unpainted metal surface at the back of
the computer before touching anything inside your computer.
While you work, periodically touch an unpainted metal surface on the
computer to dissipate any static electricity that might harm internal
components.
4 Disconnect any devices connected to the computer, including the
monitor, from their electrical outlets to reduce the potential for
personal injury or shock. Also, disconnect any telephone or
telecommunication lines from the computer.
5 Disconnect the power cable to your computer, and then press the
power button to ground the system board.