Chapter 5. Power

This chapter covers the following A+ exam topics:

Understanding and Testing Power

Power Devices

Power Supplies

You can find a master list of A+ exam topics in the “Introduction.”

This chapter covers CompTIA A+ 220-801 objectives 1.8 and 5.2, and CompTIA A+ 220-802 objective 4.2.

Everything relies on power. Clean, well-planned power is imperative in a computer system. It’s so important that I almost made this the first chapter of the book. I can’t tell you how many power-related issues I have troubleshot in the past. Many of the issues that you see concerning power are due to lack of protection and improper planning, and as such you will see several questions (if not more) on the A+ exams regarding this subject.

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