Computer Literacy for IC 3 Unit 1: Computing Fundamentals © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.1 Chapter 3 Evaluating, Purchasing, and Maintaining Computer Equipment

Learning Targets Unit 1, Chapter 3 9.I can identify criteria for selecting a personal computer 10.I can identify factors that affect computer performance 11.I can identify other factors to consider when purchasing a computer © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.2

Learning Targets Continued Unit 1, Chapter 3 (continued) 12.I can give several examples of how to protect a computer from theft and physical damage 13.I can identify maintenance issues 14.I can identify and solve hardware problems 15.I can identify consumer rights and responsibilities © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.3

Protecting Computers from Theft To protect computers from theft Use cables with locks Lock doors and limit access to rooms with computers Attach unique identifying tag to computer Record serial number in separate location Install tracking software © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.4

Factors That Damage Computers Overheating Humidity Magnetic fields Electromagnetic interference Electrical damage Power surges Power fluctuations Voltage differences Static electricity © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.5

Common Problems Dust and dirt Overheated processor Sticky keys Malfunctioning mouse Printing problems Clogged jets or dirty rollers Hard disk problems Full disk, fragmentation, temporary files 6© 2010 Pearson Education, Inc. | Publishing as Prentice Hall.

Reducing Fragmentation © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.7 Fragmented – when files are broken apart and stored in different locations on the hard drive Defragment– when files are rearranged on the hard drive to get the parts of the file physically closer

Protection from Electrical Damage Surges Use power strip with circuit breaker – disconnects from electricity Surge suppressor – regulates flow of electricity Uninterruptible Power Supply (UPS) – provides continuous power using a rechargeable battery © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.8

Professional Maintenance Replacing and adding: Power supply Expansion cards Sound cards, video cards, and network cards 9© 2010 Pearson Education, Inc. | Publishing as Prentice Hall.

Professional Maintenance Replacing and adding: RAM Processor 10© 2010 Pearson Education, Inc. | Publishing as Prentice Hall.

Professional Maintenance Replacing and adding: Disk drives Floppy, optical, and hard disk 11© 2010 Pearson Education, Inc. | Publishing as Prentice Hall.

Common Hardware Problems The text book gave suggestions about what to try (p ) Nothing happens High-pitched whine Floppy won’t read Blank screen Distorted images New peripheral device doesn’t work © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.12

Steps to Resolve a Problem 1.Isolate the problem(s) 2.Restart the computer 3.Troubleshooting guide 4.Reproduce the problem 5.Document the problem 6.Find qualified help 7.Provide specific info 8.Use a repair shop © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.13

Consumer Rights and Responsibilities Hardware warranties Service contracts (AKA maintenance contracts) Useful life of a computer Technology disposal © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.14

Objectives Covered Identified criteria for selecting a personal computer Identified factors that affect computer performance Identified other factors to consider when purchasing a computer Protected a computer from theft and physical damage © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.15

Objectives Covered Identified maintenance issues Identified and solved hardware problems Identified consumer rights and responsibilities © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.16

Questions? © 2010 Pearson Education, Inc. | Publishing as Prentice Hall.17