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Extra resources for CompTIA A+ Cert Guide - 220-701 and 220-702 Exam
Most wrist straps come equipped with a resistor (often 1 megaohm) that protects the user from shock hazards when working with low-voltage components. More advanced types of wrist straps are meant to connect to an actual ground; a ground strip or the ground plug of a special dedicated AC outlet. These are used in more sophisticated repair labs. Do not attempt to connect the alligator clip of a basic wrist strap (purchased at an office store), to the ground plug of an outlet in your home. Com Chapter 1: PC Technician Essentials 5 ■ Touch the chassis of the computer— Do this to further discharge yourself be- fore handling any components.
Aspx. This site describes the CompTIA A+ certification and how the exam works, and it has downloadable objectives that show exactly what is on the exam. Com This chapter covers the following subjects: ■ The Essential Parts of Any Computer— This section lists the vital components of a PC, for example motherboards, CPUs, video cards, and more. It also shows how to identify those components. ■ Points of Failure— In this section you’ll learn about possible issues that could cause the computer to fail; for example overheating, hard drive failure, or loose adapter cards.
Aspx. One method used by many A+ certification authors is to simply follow the objectives step by step. The problem is that because different parts of the computer— such as hard disk, display, Windows, and others—are covered in many different objectives, this approach creates a lot of overlap between chapters and does not help readers to understand exactly how a particular part of the computer fits together with the rest. In this book, we have used a subsystem approach. Each chapter is devoted to a particular part of the computer so that you understand how the components of each part work together and how each part of the computer works with other parts.