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Chapter 7: Upgrading Your Computer
Preventing static electricity discharge
The components inside your computer are extremely sensitive to static electricity, also
known as electrostatic discharge (ESD).
Before opening the computer case, follow these guidelines:
■ Turn off your computer.
■ Wear a grounding wrist strap (available at most electronics stores) and attach it to
a bare metal part of your computer.
■ Touch a bare metal surface on the back of the computer.
■ Unplug the power cord and the modem and network cables.
Before working with computer components, follow these guidelines:
■ Avoid static-causing surfaces such as carpeted floors, plastic, and packing foam.
■ Remove components from their antistatic bags only when you are ready to use
them. Do not lay components on the outside of antistatic bags because only the
inside of the bags provide electrostatic protection.
■ Always hold expansion cards by their edges or their metal mounting brackets.
Avoid touching the edge connectors and components on the cards. Never slide
expansion cards or components over any surface.
Warning To avoid exposure to dangerous electrical voltages and moving parts,
turn off your computer and unplug the power cord and modem and
network cables before opening the case.
Caution ESD can permanently damage electrostatic discharge-sensitive
components in your computer. Prevent ESD damage by following
ESD guidelines every time you open the computer case.
Warning To prevent risk of electric shock, do not insert any object into the vent
holes of the case.