Transcript Computer Literacy for IC3 Unit 1, Chapter 3 Evaluating, Purchasing

Computer Literacy for
3
IC
Unit 1: Computing Fundamentals
Chapter 3
Evaluating, Purchasing, and
Maintaining Computer
Equipment
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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
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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
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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
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4
Factors That Damage Computers
• Overheating
• Humidity
• Magnetic fields
• Electromagnetic
interference
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• Electrical damage
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•
•
Power surges
Power fluctuations
Voltage differences
Static electricity
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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
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Reducing Fragmentation
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
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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
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Professional Maintenance
• Replacing and adding:
• Power supply
• Expansion cards
• Sound cards, video cards, and network cards
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9
Professional Maintenance
• Replacing and adding:
• RAM
• Processor
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10
Professional Maintenance
• Replacing and adding:
• Disk drives
• Floppy, optical, and hard disk
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Common Hardware Problems
The text book gave
suggestions about what to try
(p. 119-121)
• Nothing happens
• High-pitched whine
• Floppy won’t read
• Blank screen
• Distorted images
• New peripheral device
doesn’t work
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Steps to Resolve a Problem
1.
2.
3.
4.
Isolate the problem(s)
Restart the computer
Troubleshooting guide
Reproduce the
problem
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5.
6.
7.
8.
Document the problem
Find qualified help
Provide specific info
Use a repair shop
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Consumer Rights and Responsibilities
• Hardware warranties
• Service contracts (AKA
maintenance contracts)
• Useful life of a computer
• Technology disposal
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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
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15
Objectives Covered
• Identified maintenance issues
• Identified and solved hardware problems
• Identified consumer rights and responsibilities
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Questions?
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