chapter 7
Power Supplies
“I have the power!”
—HE-MAN
In this chapter, you will learn how to
■ Explain the basics of electricity
■ Describe the details of powering the PC
■ Install and maintain power supplies
■ Explain power supply troubleshooting and fire safety
Computers need electricity to run. Where this electricity comes from depends on the device. Mobile devices use batteries (covered in detail in Chapter 23). Desktop computers need a special box—the power supply unit (PSU)—that takes electricity from the wall socket and transforms it into electricity your computer can use. Figure 7.1 shows a typical power supply.
• Figure 7.1 Power ...
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