When Working Inside Your Computer - Dell Dimension 4200 Solution Manual

Dell dimension 4200: user guide
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8
Safety Instr uctions
To help prevent electric shock, plug the computer and device power
cables into properly grounded power sources. These cables are
equipped with 3-prong plugs to help ensure proper grounding. Do not
use adapter plugs or remove the grounding prong from a cable. If you
must use an extension cable, use a 3-wire cable with properly grounded
plugs.
To help protect your computer from sudden, transient increases and
decreases in electrical power, use a surge suppressor, line conditioner,
or uninterruptable power supply.
Be sure that nothing rests on your computer 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 70).
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 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 this guide and elsewhere in Dell documentation. Always follow
installation and service instructions closely.
Turn off your computer and all devices.
1
Ground yourself by touching an unpainted metal surface at the back of
2
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.
Disconnect any devices connected to the computer, including the
3
monitor, from their electrical outlets to reduce the potential for
personal injury or shock. Also, disconnect any telephone or
telecommunication lines from the computer.

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