PC Pro 7.0 Unit 10

Peripheral
Devices

CHAPTER 10

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Open Ended

What do people think of when they hear peripheral devices?

Peripheral
Devices

10.1

PERIPHERAL DEVICES

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Key Terms

•Digitizer
Input device
Input & output (I/O) device
KVM (keyboard, video, mouse) switch
Lumen
Near-field communication (NFC)
Output device

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Key Definitions

•Digitizer: A device that captures an analog signal and turns it

into digital data. Examples include graphics tables, document
scanners, and 3D scanners.
Input device: A device that sends data to a computer.
Input & output (I/O) device: A device that can input data to a
computer and accept output data from a computer. Example
include CD-ROMs, DVD-ROMS, USB flash drives, hard disk drives,
network adapters, and Bluetooth adapters.
KVM (keyboard, video, mouse) switch: A switch that allows
multiple computers to use a single keyboard, mouse, and
monitor.

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Key Definitions

•Lumen: A unit of measurement that indicates an amount of

light.
Near-field communication (NFC): A set of communication
protocols that allow devices to communicate when they are
within 1.6 inches of one another. NFC devices are commonly
used in retail stores and restaurants with Tap Pay phone apps.
Output device: A device used to send or display data from a
computer.

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Peripheral Devices

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Peripheral Device Types

•Input devices

• Keyboard

Mouse
Scanners

•Output devices

• Monitor

Printer

•I/O Devices

• Touchscreen

KVM switch

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Device Connection

•Connection type

• USB

FireWire
Wireless

•System compatibility

• System requirements

Hardware requirements

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Post-Connection Steps

•Install and configure

• Software

Drivers
Settings

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Class Discussion

•What are the three types of peripheral devices?
Which connector is used by most peripheral devices?
Which peripheral devices require little to no configuration?
How can you verify that a device is compatible with a particular
computer?
Which peripheral devices require special software or drives to
function?
What is the difference between an input device and an output
device?

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Display
Devices

10.2

PERIPHERAL DEVICES

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Section Skill Overview

•Configure advanced display settings in Windows
Select and configure dual monitors
Configure display settings in Linux and macOS

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Key Terms

•Color depth
Resolution

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Key Definitions

•Color depth: The number of bits used for each color component

of a single pixel.
Resolution: A measurement of an image's sharpness and
clarity. The more pixels that make up an image, the higher its
resolution.

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In-Class Practice

Do the following labs:
•10.2.3 Select and Configure Dual Monitors

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Class Discussion

•What are some of the specifications used by display devices?
What are the benefits of a higher resolution?
What is the refresh rate?

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Display,
Video, and
Projector
Trouble-shoot
ing

10.3

PERIPHERAL DEVICES

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Key Terms

•Artifact
Burn-in
Codec
Video Graphics Array (VGA) mode

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Key Definitions

•Artifact: Part of an image that stays on-screen after the rest of

the image has left.
Burn-in: Also known as image retention (IR), burn-in is when an
image is displayed on a screen for too long and becomes
permanently stuck.
Codec: A file format.
Video Graphics Array (VGA) mode: A simplified startup mode
that can help you troubleshoot video card issues that interrupt
Windows OS functions.

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Video Troubleshooting

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Video Troubleshooting

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No Image on Monitor

•Computer powered on?
Monitor powered on?
Monitor connected to video?
Not in power-save mode?
Failed monitor power
Failed video board
Damaged video cable
Unseated video board

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Video Troubleshooting

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Video Board

•ESD damage
Overheating
Board not secured

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Video Cable

•Incompatible connectors
Damaged cable
Damaged connectors

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VGA Mode

•Bad or missing driver
Safe mode

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Thermal Shutdown

•Control the temperature
Keep cooling vents clear

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Color Calibration

•Use the native resolution
Set the color depth to 32 bits
Work at operating temperature
Print out a color image
Match print and monitor

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Dim Image

•Improper brightness settings
Malfunctioning backlight
Burnt-out backlight
Malfunctioning inverter

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Flickering Image

•Failing CFL
Failing inverter

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Video Troubleshooting

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Dead or Stuck Pixels

•Apply finger pressure
Software

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Projector Troubleshooting

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Projector Troubleshooting

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Projector Troubleshooting

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Projector Troubleshooting

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Projector Troubleshooting

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Projector Troubleshooting

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Projector Troubleshooting

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Display and Shutdown

•Set corresponding resolution
Clean or replace LCD panels
Update drivers and software
Check standby mode
Indicator light

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Audio Issues

•Check computer audio output
Update projector apps
Convert VGA to HDMI
Select audio delay function

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Summary

•Physical issues
Display issues
Unexpected shutdowns
Audio problems

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Class Discussion

• What components comprise the video system in a PC?

What can cause no output on a video monitor?
The output on a video monitor is displayed in VGA mode. What could
cause this?
A monitor suddenly shuts off during use. What could cause this?
What can cause the output of an LCD to look pixilated and chunky?
What are some causes of a dim LCD screen?
What setting can be changed to stop an LCD from flickering?
How can you remove image retention on a plasma display?
An LCD monitor has dead and stuck pixels. How can you fix this
issue?
What setting can affect the size of images and icons?

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Device
Driver
Managemen
t

10.4

PERIPHERAL DEVICES

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Section Skill Overview

•Install and manage device drivers on Windows
•Manage devices on Linux
•Manage devices on macOS

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Key Terms

•Direct Memory Access (DMA)
Driver
Hot swappable device
Interrupt Request (IRQ)
Input/Output address (I/O address)

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Key Definitions

•Direct Memory Access (DMA): Conduits used by high-speed

devices to bypass the CPU and communicate directly with RAM.
Driver: A program that enables the operating system to interact
with hardware devices.
Hot swappable device: A device that can be added and removed
without shutting down the computer. For example, thumb drives
are hot swappable.
Interrupt Request (IRQ): A communication method that allows a
device to interrupt the CPU and request processing time.
Input/Output address (I/O address): A data address that allows
two devices in a computer to send information to each other.

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Device Installation

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Legacy Devices

•Require manual configuration
Use IRQs 0-15

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Device Drivers

•OS has some default drivers
Installation requires admin
OS- and hardware-specific
Digital signatures
Keep drivers up to date

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Summary

•Device compatibility
Plug-and-play devices
Legacy devices
Installing drivers
Hot swappable devices
Safely remove hardware

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In-Class Practice

Do the following labs:
•10.4.7 Manage Devices

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Class Discussion

•Which type of hardware devices use DMA channels to
communicate directly with RAM?
When is it necessary to manually configure a device?
Which system rights are required to install devices?
What is the function of the driver?
What is the importance of driver signing? What should you be
aware of when using a driver that is not signed?
How do you safely remove a hot swappable component?

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Class Discussion

•How do you verify that a device is compatible with the version
of Windows you are running before you purchase it?
Where are the best places to obtain the most up-to-date version
of a driver for each of the following: a Windows system, a
macOS system, and a Linux system?

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Device Driver
Troubleshooting

10.5

PERIPHERAL DEVICES

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Section Skill Overview

•Update and roll back device drivers
Enable and disable devices in Device Manager
Use the Last Known Good Configuration, Safe Mode, and restore
points to recover from device-related errors
Update hardware device firmware

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Key Terms

•Roll back

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Key Definitions

•Roll back: Revert a system that has received an update or other

change to its previous state.

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Device Driver Troubleshooting

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Troubleshooting Devices

•Check cable connections
Check power connections
Cards are seated and secured

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Device Driver Troubleshooting

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Device Driver Troubleshooting

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Device Status Icons

•Grey arrow = device disabled
Yellow triangle with "!" = device not working properly
Yellow "?" = device detected; no driver loaded

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Reverting the System

•Roll back the driver
Uninstall, then reinstall
Restore point

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Summary

•Check the basics
Verify device in BIOS
Verify in Device Manager
Known good hardware

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In-Class Practice

Do the following labs:
•10.5.4 Manage Devices 1
10.5.5 Manage Devices 2

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Class Discussion

•What are the first items you should check when you have
installed a new device and it is not working properly?
How do you verify that a device is recognized and enabled in
Device Manager?
What should you do if the system crashes during startup before
you can log on?
If you cannot boot the system into Safe Mode, which steps
should you take to boot the system?
Once you get a system started after reducing it to a minimal
state, how do you identify a component that has a problem?

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