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Upgrading and Repairing PCs. Chapter 2: PC Components, Features, and System Design. What is a PC?. The definition of “IBM Compatible” or “Clone” Who controls Hardware and Software? Microsoft was free to sell their OS (DOS) to anyone, making IBM clones seemingly identical to their competition.

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Upgrading and repairing pcs l.jpg

Upgrading and Repairing PCs

Chapter 2:

PC Components, Features, and System Design


What is a pc l.jpg
What is a PC?

  • The definition of “IBM Compatible” or “Clone”

  • Who controls Hardware and Software?

  • Microsoft was free to sell their OS (DOS) to anyone, making IBM clones seemingly identical to their competition


System types l.jpg
System Types

  • 8 Bit 8088

  • 16 Bit 286/386SX

  • 32 Bit 386DX/486

  • 64 Bit Pentium/Pentium Pro

  • PC/XT systems

  • AT systems


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System Components

  • Motherboard

  • Processor

  • Memory (RAM)

  • Case

  • Power Supply

  • Disk Drives

  • Keyboard and Mouse


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System Components

  • Video Card

  • Sound Card

  • Monitor (Display)

  • Speakers

  • Modem


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The Motherboard

  • Processor Socket

  • Chipset

  • Level 2 cache

  • Memory Sockets

  • ROM BIOS

  • Bus Slots


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Processor

  • CPU “Central Processing Unit”

  • The “Brain” or “Engine” of the Computer

  • Reads Instructions (commands) from memory then executes them

  • One of the most expensive, yet smallest components


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Memory

  • RAM (Random Access Memory)

  • Requires power to maintain storage

  • ROM (Read Only Memory)

  • Doesn’t require power to maintain storage

  • SIMM (Single Inline Memory Module)

  • DIMM (Dual Inline Memory Module”


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Case and Power Supply

  • The shell of your computer

  • Protects and directs air flow

  • Different “Form Factors”

  • Power Supply converts AC into DC

  • Important yet often over looked


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Disk Drives

  • Hard Disk (Fixed Disk) - primary storage area for computer. Analogous to a filing cabinet

  • Floppy Disk- used for storing and exchanging small files

  • CD-ROM Drives- Holds greater amounts of data and are faster than floppies, yet slower than hard disks


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Keyboard and Mouse

  • Many kinds of keyboards

  • Only input device available prior to the invention of the GUI (graphical user interface)

  • After the GUI, mice followed

  • “Point and Click”


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Video Card

  • Chipset

  • Video Ram

  • DAC (Digital to Analog Converter)

  • BIOS

  • Popular upgrade component, especially for gaming


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Sound card and Speakers

  • Also popular upgrade components

  • Popular for home recording

  • Game Port

  • Many high quality home PC speaker systems. Can rival home stereos


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Monitor

  • Similar to a high quality television

  • Video card send its memory contents to monitor

  • DAC chip


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