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Mike Meyers' CompTIA A+ Guide to 802 Managing and Troubleshooting PCs Lab Manual, Fourth Edition (Exam 220-802), 4th Edition by Mike Meyers

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Your PC includes five core components that it can’t live without: a CPU, RAM, the BIOS, a motherboard, and a power supply. If any of these pieces fail, your computer won’t work. A bad CPU might cause unexpected shutdowns or system lockups, but these problems might also be caused by bad RAM or a failing power supply. You’ll need to determine which component is causing the problem and fix it (or replace it, as is often the case with ...

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