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Any Questions?. Chapter 9-Installing and Supporting I/O devices. General Approaches to take when installing I/O About Keyboards How to work with the mouse and pointing devices Monitors and video cards and how they relate How to use ports and expansion for add-on devices

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  1. Any Questions?

  2. Chapter 9-Installing and Supporting I/O devices • General Approaches to take when installing I/O • About Keyboards • How to work with the mouse and pointing devices • Monitors and video cards and how they relate • How to use ports and expansion for add-on devices • Troubleshooting I/O devices, including keyboards, pointing devices and video Pg 341

  3. Basic Principles for I/O • Internal or external devices • I/O devices are controlled by software • Manufacturers instructions take precedence • Some devices need application software • Some problems can be solved by updateing drivers • I/O devices are a moving target Pg 342

  4. Basic Principles for I/O • Internal or external devices • I/O devices are controlled by software • Manufacturers instructions take precedence • Some devices need application software • Some problems can be solved by updateing drivers • I/O devices are a moving target Pg 342

  5. Keyboards • Straight or Ergo • Repetitive Stress Injury • Carpal Tunnel Syndrome (CTS) • Foil or Metal contact • When key is pressed contact is made • Connections • 5 pin DIN • 6 pin PS/2 • USB • Generally no drivers (unless wireless) Pg 344

  6. Mouse and pointers • Mouse • Scroll wheel • Keyboard stick • Mouse ball drives x and y axis rollers • Buttons can be customized Pg 346

  7. Touch Screens & Trackpads • Touchscreen • Uses monitor or LCD panel as background • Built in to regular monitor • Or added on • Must keep calibrated • Trackpad/Touchpad • Finger pad-like laptop • Trackball • Upsidedown mouse-move ball with your finger Pg 349

  8. Match Them!

  9. Touch Screens & Trackpads • Touchscreen • Uses monitor or LCD panel as background • Built in to regular monitor • Or added on • Must keep calibrated • Trackpad/Touchpad • Finger pad-like laptop • Trackball • Upsidedown mouse-move ball with your finger Pg 349

  10. Specialty • Barcode Reader • Pen wand • Slot Scanner • CCD(Scan Gun) • Image scanner • Laser scanner • USB, Wireless, Serial connection • Converts code to numbers Pg 350

  11. Specialty • Biometric Reader • Fingerprint • Retina • Handprint • Voice • Etc • Disadvantages • False readings • Advantage • Convenient Pg 350

  12. Monitors, Projectors, Video Cards • CRT Monitor • Filament at back of tube fires electrons at screen on front • By altering color and brightness, it “paints” the screen • When the beam hits the screen, it phosphoresces-lights up Pg 354

  13. Monitors, Projectors, Video Cards • LCD Monitor • LCD also known as flat panel • Layers of glass, electrodes and liquid crystals that are easily polarized • Electrodes make the crystals turn to let through the light • Scan across in a similar way to CRT • http://electronics.howstuffworks.com/lcd2.htm Pg 354

  14. Monitors, Projectors, Video Cards • LCD Monitor • LCD also known as flat panel • Layers of glass, electrodes and liquid crystals that are easily polarized • Electrodes make the crystals turn to let through the light • Scan across in a similar way to CRT • http://electronics.howstuffworks.com/lcd2.htm • Most screens now Actice Matrix or TFT • Older were passive matrix or DSTN Pg 354

  15. Choosing CRT or LCD • CRTs are better in some categories • LCDs are lighter, smalled and more responsive • Also much more popular now • And more expensive Pg 358

  16. Choosing CRT or LCD • CRTs are better in some categories • LCDs are lighter, smalled and more responsive • Also much more popular now • And more expensive Pg 358

  17. Choosing CRT or LCD • Contrast Ratio • Contrast between true black and true white • Higher is better • Native Resolution • Number of spots or pixels on the screen • More give finer images Pg 358

  18. Video Standards and Resolutions Pg 358

  19. Projector • Good for presentations or large audience • Costs have come down • Use an S-Video or 15 pin video • Newer ones may have more • Need either the extra 15 pin port or a dual head cable for projector • Laptops usually come with video port Pg 362

  20. Video Cards • Interface between monitor and computer • Graphics card, video adapter, video board, display card, etc • Sometimes integrated • Often separate on higher end machines • RGB/VGA • DVI • Composite Video • S Video • HDMI Pg 363

  21. Video Buses • VESA • Specifically for video • PCI • AGP • Specifically for video • PCI Express x16 • Is starting to replace AGP, not usually on same MB Pg 365

  22. AGP Standards • Releases • 1.0,2.0, 3.0 • Slot length • Speed • 1x, 2x, 4x, 8x • Voltages • Slot types • See table Pg 365

  23. PCI Express and graphic accelerators • Newest standard x16 • Twice as fast as AGP • Newest cards have their own specialized CPU • Higher heat Pg 368

  24. Video Memory • Older systems didn’t need memory • Now, much more is expected of the systems • Video memory depends on • Resolution in pixels • Number of colors-Color Depth • Color Enhancement-Alpha blending • Frame buffer is memory that holds this info before sending to monitor Pg 369

  25. Video Memory • Better cards hold multiple frames in the buffer at once • Memory types • Video RAM • SGRAM • WRAM • MDRAM • 3-D RAM • DRDRAM • GDDR Pg 369

  26. Installing Video cards • Read docs • Check Motherboard • Open Case • Ground yourself • Install Card • Load or get best drivers • Set features Pg 370

  27. Using ports for Add-Ons • Recognize ports • Serial used for ???? • Infrared • Parallel • USB • 1.1 had 1.5 or 12 Mbps • 2.0 up to 480 Mbps • Daisy Chain devices Pg 373

  28. Troubleshooting I/O • Check the installation • See if anything has changed • Try to isolate problem • Check simple things • Power • Connection • Check device manager • Exchange for a working one or install in a working system • Document changes Pg 98

  29. Troubleshooting Keyboards • Some Keys don’t work • Keyboard doesn't work at all • Key Repeats • Wrong character • Spills Pg 399

  30. Troubleshooting Touch Screen • Check connection and Device Manager • Look for scratches • Check for gaps/crumbs • Recalibrate • Uninstall and Reinstall Pg 400

  31. Troubleshooting Mouse or touchpad • Check connection • Look for dirt • Verify Settings • Try new mouse Pg 400

  32. Troubleshooting Monitors & Video Cards • Check plugs • Check power • Check for fuse • Check input switch • LED on, no picture • Power On, Wrong Characters • Monitor Flickers/Wavy Lines • Power settings • Color display • Picture focus • Sound Pg 400

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