Before you remove the computer cover, perform the following steps in the sequence indicated.
NOTICE: Do not attempt to service the computer yourself, except as
explained in your online Dell™ documentation or otherwise provided to you.
Always follow installation and service instructions closely.
CAUTION: There is a danger of a new battery exploding if it is
incorrectly installed. Replace the battery only with the same or
equivalent type recommended by the manufacturer. Discard used
batteries according to the manufacturer's instructions.
Turn off your computer and any peripherals.
Ground yourself by touching an unpainted metal surface on the
chassis, such as the metal around the card-slot openings at the back of
the computer, before touching anything inside your computer.
While you work, periodically touch an unpainted metal surface on the computer chassis to dissipate any static electricity that might harm internal components.
Disconnectyour computer and peripherals from their power sources.
Also, disconnect any telephone or telecommunication lines from the
computer.
Doing so reduces the potential for personal injury or shock.
In addition, take note of these safety guidelines when appropriate:
When you disconnect a cable, pull on its connector or on its strain-
relief loop, not on the cable itself. Some cables have a connector with
locking tabs; if you are disconnecting this type of cable, press in on the
locking tabs before disconnecting the cable. As you pull connectors
apart, keep them evenly aligned to avoid bending any connector pins.
Also, before you connect a cable, make sure both connectors are
correctly oriented and aligned.
Handle components and cards with care. Do not touch the
components or contacts on a card. Hold a card by its edges or by its
metal mounting bracket. Hold a component such as a microprocessor
chip by its edges, not by its pins.
Also see "Protecting Against Electrostatic Discharge." In addition, Dell recommends that you periodically review the safety instructions in your System Information Guide.
Static electricity can harm delicate components inside your computer. To prevent static damage, discharge static electricity from your body before you touch any of your computer's electronic components, such as the microprocessor. You can do so by touching an unpainted metal surface on the computer chassis.
As you continue to work inside the computer, periodically touch an unpainted metal surface to remove any static charge your body may have accumulated.
You can also take the following steps to prevent damage from electrostatic discharge (ESD):
When unpacking a static-sensitive component from its shipping
carton, do not remove the component from the antistatic packing
material until you are ready to install the component in your
computer. Just before unwrapping the antistatic packaging, be sure to
discharge static electricity from your body.
When transporting a sensitive component, first place it in an antistatic
container or packaging.
Handle all sensitive components in a static-safe area. If possible, use
antistatic floor pads and workbench pads.
CAUTION: Improper or prolonged keyboard use may result in
injury.
CAUTION: Viewing the monitor screen for extended periods of
time may result in eye strain.
For comfort and efficiency, observe the following ergonomic guidelines when setting up and using your computer system:
Position your system so that the monitor and keyboard are directly in
front of you as you work. Special shelves are available (from Dell and
other sources) to help you correctly position your keyboard.
Set the monitor at a comfortable viewing distance (usually 510 to 610
millimeters [20 to 24 inches] from your eyes).
Make sure the monitor screen is at eye level or slightly lower when you
are sitting in front of the monitor.
Adjust the tilt of the monitor, its contrast and brightness settings, and
the lighting around you (such as overhead lights, desk lamps, and the
curtains or blinds on nearby windows) to minimize reflections and
glare on the monitor screen.
Use a chair that provides good lower back support.
Keep your forearms horizontal with your wrists in a neutral,
comfortable position while using the keyboard or mouse.
Always leave space to rest your hands while using the keyboard or
mouse.
Let your upper arms hang naturally at your sides.
Sit erect, with your feet resting on the floor and your thighs level.
When sitting, make sure the weight of your legs is on your feet and not
on the front of your chair seat. Adjust your chair's height or use a
footrest, if necessary, to maintain proper posture.
Vary your work activities. Try to organize your work so that you do not
have to type for extended periods of time. When you stop typing, try
to do things that use both hands.
