A+ Guide to Managing and Maintaining Your PC Fifth Edition Chapter 10 Supporting I/O Devices.
-
Upload
norman-day -
Category
Documents
-
view
214 -
download
0
Transcript of A+ Guide to Managing and Maintaining Your PC Fifth Edition Chapter 10 Supporting I/O Devices.
2A+ Guide to Managing and Maintaining Your PC, Fifth Edition
You Will Learn… How to use ports and expansion slots for add-
on devices
How to install peripheral I/O devices
About keyboards and how to troubleshoot them
About different types of pointing devices
How monitors and video cards relate to the system, and how to troubleshoot them
3A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Basic Principles of Peripheral Installations Both hardware and software must be installed
(hardware is controlled by software) Install all levels of software Device driver must be written specifically for
the OS More than one peripheral device might attempt
to use same resources Update drivers, the firmware, or both
4A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Installation Overview
1. Install the device (internal or external)
2. Install the device driver
3. Install the application software
6A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using Ports and Expansion Slots for Add-on Device Ports
Serial
Parallel
USB
IEEE 1394
SCSI
Expansion slots
8A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using Serial Ports
Transmit data in single bits (serially)
Nine or 25 pins
Almost always male
Originally intended for input and output devices
Configured as COM1, COM2, COM3, or COM4
9A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using Serial Ports (continued)
Port assignments are made in CMOS setup
Conform to standard interface called RS-232c
Data Terminal Equipment (DTE) and Data Communications Equipment (DCE) designations
13A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Null Modem Connection
Enables data transmission between two DTE devices without the need for modems
Special cable (null modem cable) has several wires cross-connected to simulate modem connection
14A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Pin Connections for a 25-Pin Null Modem Cable
15A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Wire Connections on a 25-Pin Null Modem Cable
16A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Infrared Transceivers Use resources of a serial port for
communication
Create a virtual infrared serial port and virtual infrared port for infrared devices
UART logic on the motherboard controls serial ports on the board
Line-of-sight issue
17A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using Parallel Ports Transmit data in parallel, eight bits at a time
Almost always female
Originally intended for printers
Can be configured as LPT1, LPT2, or LPT3
Port assignments are made in CMOS setup
Avoid using a cable longer than 15 feet to ensure data integrity
18A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Types of Parallel Ports Standard parallel port (SPP)
Allows data to flow in only one direction Slowest of the three types
Enhanced Parallel Port (EPP) Bi-directional
Extended Capabilities Port (ECP) Bi-directional Uses the DMA channel
20A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Configuring Parallel Ports
Setup can have up to four different settings for parallel ports
21A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using USB Ports
Effortless installation of slow peripheral devices
Much faster than regular serial ports; use higher-quality cabling
Easier to manage; eliminate need to manually resolve resource conflicts
Likely to replace serial and parallel ports
22A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using USB Ports (continued)
Allow for hot-swapping; are hot-pluggable
Most current motherboards have one to four USB ports
Managed by a USB host controller
As many as 127 USB devices can be daisy-chained together using USB devices
25A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Requirements for Preparing to Install a USB Device Motherboard or expansion card that provides a
USB port
OS that supports USB
USB device
USB device driver
26A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Installing a USB Device
Some devices (eg, printers) require the device to be plugged in before installation
Some devices (eg, scanners) require the driver to be installed before the device is plugged in
Using Device Manger, verify that USB controller is installed and working properly
27A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using IEEE 1394 Ports
Transmit data serially; faster than USB Likely to replace SCSI for high-volume,
multimedia external devices Provide either a 4-pin or 6-pin connector Hot-pluggable
Can be daisy-chained together and managed by a host controller using one set of system resources
Use isochronous data transfer
28A+ Guide to Managing and Maintaining Your PC, Fifth Edition
IEEE 1394 Port Standards IEEE 1394A
Supports data speeds up to 1.2 Gbps
Allows for cable lengths up to 15 feet
IEEE 1394B
Supports speeds up to 3.2 Gbps
Allows for cable length up to 328 feet
31A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Installing an Expansion Card in an Expansion Slot
32A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using Specialized Devices and Extra Ports
33A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using PCI Expansion Slots PCI bus
Currently the standard I/O bus Uses an interim interrupt between PCI card and
IRQ line to the CPU PCI bus controller
Manages the PCI bus and expansion slots Assigns IRQ and I/O addresses to PCI expansion
cards Use Device Manager to see which IRQ has
been assigned to a PCI device
35A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Using ISA Expansion Slots
Configuration is not automated
ISA bus does not manage system resources, as do USB and PCI bus controllers
ISA device must request system resources at startup
36A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Solving Problems with Legacy ISA Expansion Cards
Resource conflicts between two legacy devices
Use Windows Device Manager
Problems using legacy device drivers
Try to locate a 32-bit driver for the device
37A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Solving Problems with Legacy ISA Expansion Cards (continued)
Create empty copy of Autoexec.bat and Config.sys on hard drive then
• boot up into MS-DOS mode
• run setup program from command prompt
• copy appropriate command lines into original versions of Autoexec.bat and Config.sys
38A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Solving Problems with Legacy ISA Cards
39A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Solving Problems with Legacy ISA Cards (continued)
40A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Keyboards
Traditional straight design or ergonomic design
Two technologies for keys making contact
Foil contact
Metal contact
Installing keyboards
41A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Keyboard Connectors PS/2 connector (or mini-DIN)
Small, round, with six pins
DIN connector Round with five pins
USB port
Wireless connection Requires a driver
45A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Troubleshooting Keyboards
A few keys don’t work
Keyboard does not work at all
Key continues to repeat after being released
Keys produce the wrong characters
Major spills on the keyboard
48A+ Guide to Managing and Maintaining Your PC, Fifth Edition
How a Mouse Connectsto the Computer Dedicated round mouse port (motherboard
mouse or PS/2-compatible mouse)
Mouse bus card (bus mouse)
Serial port (serial mouse)
USB port
Y-connection with the keyboard
Cordless technology
49A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Pointing Devices
Touch screens
Other pointing devices
Trackballs
Touch pads
50A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Troubleshooting a Mouse
Check mouse port connection
Check for dust or dirt; reboot PC
Try new mouse
Uninstall and reinstall mouse driver; reboot PC
Reboot PC and select logged option from startup menu to create Bootlog.exe file Continue to boot and check log for errors
51A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Computer Video
Necessary components for video output
Monitors
Video cards
52A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Monitors
Rated by screen size, resolution, refresh rate, and interlace features
Most meet standards for Super VGA
Use CRT (cathode-ray tube) or LCD (liquid crystal display) technology
55A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Monitors Monitors and ELF emissions
Flat panel monitors Active-matrix
Dual-scan passive matrix
Installing dual monitors Increases size of Windows desktop
You must choose to activate a second monitor before it will be used by Windows
57A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Video Cards
Methods of data transfer
RGB video port
DVI port
Composite video
S-Video
59A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Transferring Data with anS-Video Cable
60A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Video Cards Quality is rated according to how video
subsystem affects overall system performance, video quality, power-saving features, and ease of use and installation
Main features to look for Bus used (VESA, PCI, or AGP)
Amount and type of video RAM it has or can support
62A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Graphics Accelerators Type of video card that has its own processor
to boost performance
Features reduce burden on motherboard CPU, (eg, MPEG decoding, 3-D graphics, dual porting, color space conversion, interpolated scaling, EPA Green PC support, digital output to flat panel display monitors, application support for high-intensity graphics software)
63A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Video Memory Stored on video cards as memory chips
Amount of data received from CPU is determined by Screen resolution
Color depth
Alpha blending
Several types (VRAM, SGRAM, WRAM, 3-D RAM)
64A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Troubleshooting Video Problems Power light (LED) does not go on; no picture
Power LED is on, no picture on power-up
Power is on, but monitor displays wrong characters
Monitor flickers, has wavy lines, or both
No graphics display on screen or screen goes blank when loading certain programs
65A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Troubleshooting Video Problems (continued) Screen goes blank 30 seconds or one minute
after keyboard is left untouched
Poor color display
Picture out of focus or out of adjustment
Crackling sound
66A+ Guide to Managing and Maintaining Your PC, Fifth Edition
Video Monitors
Configuring or changing monitor settings and drivers in Windows
Changing video driver configuration
Returning to standard VGA settings