A+ Certification Guide Chapter 1 Technician Essentials and PC Anatomy

Chapter 1 Objectives The Essential Parts of Any Computer: The vital components of a PC—an overview Hardware, Software, and Firmware: Explain how hardware, software, and firmware interact, and define the major types of software and utility programs. Points of Failure: Learn about possible issues that could cause the computer to fail—for example, overheating, hard drive failure, or loose adapter cards. The CompTIA Six-Step Troubleshooting Process PC Tools: Demonstrate how to assemble/disassemble the computer safely. Resources to prepare for the exam: Websites and exam resources.

Essential Parts of a Computer Storage devices Motherboards Power supplies Processors/CPUs Memory Display devices Input, multimedia, and biometric devices Adapter cards Ports and cables Cooling systems The next 2-4 slides can work nicely together if you want to do a little rework on these and especially if you have a desktop PC and a laptop PC available as live examples. Simply point out the same things that are on these slides, and then using Slide 6 as a guide, point out the points of failure that the student might encounter.

Front Side of PC

What Are All Those Connections and Lights For?

Motherboard Components

Example: A Laptop PC Side View Figure 1-4 01fig04 Illustration: Please add callouts as indicated and initial-cap Proprietary.

Example: A Laptop PC side view Figure 1-5 01fig05 Illustration: Please add callouts as indicated remove hyphen and space for DVD multioptical drive.

Points of Failure Overheating: Loose peripheral card: Failure of the fans in the power supply or those attached to the processor, northbridge chip, or video card can cause overheating. Loose peripheral card: A loose add-on card might not be detected by plug-and-play or might have intermittent failures after installation. Inability to start the computer: Loose processor/memory module can prevent the computer from starting. Drive failures: Improperly connected power or data cables, or improperly configured jumper blocks, will not work properly. Front panel failures: Cables connecting the case switch, reset switch, and status lights. Battery failure BIOS chip failure

Hardware, Software, and Firmware Components that can generally be touched or seen. Often a source of failure: Loose connections Physical damage Electrical damage (electrostatic, voltage spikes/surges) Incompatibility of devices with other devices Software: Drivers used to control the hardware Applications used to generate user data Protocols to transmit data over the network Internal/external commands to control the system Analogy: Internal Versus External Commands Point out that like a computer, your body also has a need for both internal and external commands. For example, you do not consciously tell your heart to beat 70 times per minute. That would consume resources of the brain needed for more conscious activities. Although eating may appear to be an involuntary function for some of us, you do tell yourself when to eat, which is, of course, a necessary function for the heart to continue pumping. In fact, the act of eating speeds up the heart to send resources to the stomach muscles. Likewise, the computer's internal commands cause some things to just happen, such as CPU clock cycles. However, opening a program file might redirect the way those clock cycles access RAM, hard drives, and other motherboard resources.

The CompTIA Six-Step Troubleshooting Process Description Step 1­ Identify the problem. Step 2­ Establish a theory of probable cause. (Question the obvious.) Step 3­ Test the theory to determine the cause. Step 4­ Establish a plan of action to resolve the problem and implement the solution. Step 5­ Verify full system functionality and, if applicable, implement preventative measures. Step 6­ Document findings, actions, and outcomes.

Tools: Working Inside the PC Opening the Case: Different manufacturers have different case access mechanisms. Protect your system against electrostatic discharge (ESD). Common Tasks: Connecting internal and external data cables. Recheck periodically; can work loose over time. Installing a PCI card (for example, video or sound card). Replacing the power supply. Replacing the hard drive. Replacing the CD-ROM/DVD-ROM. Upgrading memory. Installing a USB support.

Basic Tools for Assembly/Disassembly of Computers Illustration: This is a pick up of Figure 1-1 from "CompTIA A+ 220-701 and 220-702 Cert Guide“ 2e (ISBN: 978-0-7897-4790-7). Figure 1-7 01fig07

Refer to the pictures in the book or demonstrate the safe installation of a peripheral card using an ESD strap. This will be seen again later, but a short demo can be an effective attention-getter. Figure 1-8 Illustration: This is a pick up of Figure 2-6 from "CompTIA A+ 220-701 and 220-702 Cert Guide“ 2e (ISBN: 978-0-7897-4790-7).

System and Testing Tools Multimeter: AC/DC voltage Ohms Amperage Power Supply Tester: Can save a motherboard from being ruined by a bad power supply Loopback plugs: Serial, network, and USB port testing

Network Testing Tools Cable tester Punch-down tool Loopback plugs Toner probes Wire strippers Crimper

What Have You Learned? Name four common hardware failures. How does the CPU receive data? What device has the IRQ with the highest priority? Why is it important to use ESD precaution? What is a resource conflict? How is software different from firmware?

Exercise Activity 2.2: The motherboard and CPU. Consider using Topic and Activity 2.3 in the Instructor Guide to get students thinking about troubleshooting inputs and outputs.

Chapter 1 Summary Essential Parts of a Computer: Motherboards, CPUs, video cards, and how to identify them. Hardware, Software, and Firmware Points of Failure: Issues that could cause the computer to fail—for example, overheating, hard drive failure, or loose adapter cards. Six-Step CompTIA Troubleshooting Process Working Inside Your PC: How to assemble/disassemble the computer safely. Next Lesson: Chapter 2