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Safety Instructions
Dell™ OptiPlex™ GX400 System User's Guide
Safety First
—
For You and Your Computer
Protecting Against Electrostatic Discharge
Ergonomic Computing Habits
Safety First
—
For You and Your Computer
Before you remove the computer cover, perform the following steps in the sequence indicated.
1.
Turn off your computer and any peripherals.
2.
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.
3.
Disconnect
your 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:
l
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.
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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
.
Protecting Against Electrostatic Discharge
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):
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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.
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When transporting a sensitive component, first place it in an antistatic container or packaging.
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Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads and workbench pads.
Ergonomic Computing Habits
For comfort and efficiency, observe the following ergonomic guidelines when setting up and using your computer system:
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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.
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Set the monitor at a comfortable viewing distance (usually 510 to 610 millimeters [20 to 24 inches] from your eyes).
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Make sure the monitor screen is at eye level or slightly lower when you are sitting in front of the monitor.
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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.
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.
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.
