CompTIA A+ Cert Guide - 220-701 and 220-702 Exam - download pdf or read online

By Mark Edward Soper, Scott William Mueller, David L. Prowse

ISBN-10: 0789740478

ISBN-13: 9780789740472

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Torx driver 12. Hex driver 13. 3-claw parts retrieval tool Figure 1-1 Typical tools used by computer technicians. Preventing Electrostatic Discharge Electrostatic discharge (ESD) occurs when two objects of different voltages come into contact with each other. The human body is always gathering static electricity, more than enough to damage a computer component. ESD is a silent killer. If you were to touch a component without proper protection, the static electricity could discharge from you to the component, most likely damaging it, but with no discernable signs of damage.

If you were to touch a component without proper protection, the static electricity could discharge from you to the component, most likely damaging it, but with no discernable signs of damage. Worse yet, it is possible to discharge a small amount of voltage to the device and damage it to the point where it works intermittently, making it tough to troubleshoot. It only takes 30 volts or so to damage a component. On a dry winter day, you could gather as much as 20,000 volts when walking across a carpeted area!

When installing or removing components, keep them either inside or on top of the bag until you are ready to work with them. Remember: ESD need only happen once, and that $500 video card you are trying to install is toast! The CompTIA Six-Step Troubleshooting Process It is necessary to approach computer problems from a logical standpoint. To best accomplish this, PC technicians will implement a troubleshooting methodology (or maybe more than one). CompTIA has included a six-step process within the 2009 A+ objectives.

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CompTIA A+ Cert Guide - 220-701 and 220-702 Exam by Mark Edward Soper, Scott William Mueller, David L. Prowse


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