1. Scanner Monitor Speaker External Drive Keyboard Mouse

2. XT Keyboard AT (Standard) AT (Enhanced)

3. Dvorak Layout Ergonomic Keyboard

5. Scan codeInterprets the key New scan code

6.  Keys stick.  User with physical limitation is currently unable to use the standard keyboard.  No input is sent when keys are pressed.  Keyboard-related messages or beep codes given during computer boot.  Wrong characters are displayed on the screen when user inputs information.  Multimedia buttons not working properly.  New keyboard won’t plug into the same port as the old keyboard.

7. Mouse Trackball Touchpad

8. Click! Encoder wheel

9.  Mouse pointer jumps around on the screen.  Cordless mouse is in use and mouse pointer is jumping around or not moving.  Mouse works sometimes, but not others.  Mouse is not working.  USB mouse is not working properly.

14. Data

15. Red Blue Green Color dots Electron guns Magnetic yoke Horizontal & vertical deflection coils

16. TechnologyDescription Shadow mask One way to keep the beam from hitting the wrong dot is to use a metal sheet with a tiny hole for each trio of adjacent red, green, and blue dots. This grill is a shadow mask; it keeps stray electrons from bleeding over into other colored dots. Aperture grill Other monitors use very thin vertical strips of metal to block the stray electrons from hitting the wrong dots on the tube. These strips form an aperture grill. Monitors using the aperture grill may have a brighter display with a sharper image, but wires used to stabilize the strips form very thin horizontal lines on the screen image. Slotted mask This is a combination of shadow mask and aperture grill technologies. It uses vertical slots with horizontal masks to produce a stable image that is brighter than shadow mask.

17. CharacteristicDescription ResolutionThe maximum number of pixels on a monitor. Refresh rate The number of times per second that the entire monitor is scanned to illuminate the pixels. Color depthThe number of bits used to store the color of a pixel. FontA size and style of typeface.

18. 12345 6 7 8 910 1112131415

19. The aspect ratio of most computer monitors is 4:3

21. PincushionBarrelTrapezoid

26.  No image displayed on the monitor.  Monitor flickers.  Monitor is dark or power indicator light is not lit.  Monitor turns itself off.  Screen is fine until a specific application is started, then the screen goes blank, flickers, or acts bizarrely.  Monitor is on, but rather than displaying an image or being black, it is white.

27. Creates images using pins that strike an inked ribbon Slot for font cards Moves bail bar against or away from the platten Moves bail bar against or away from the platten Cut sheet feeder Print head Adjust gap between print head and paper Adjust gap between print head and paper Ribbon Manually advance the ribbon Manually advance the ribbon Select Tractor or Friction Feed Adjust printer settings with these buttons

28. Continuous sheet paper with perforations to create individual sheets Sprockets with prongs and latches fit over holes in the edge of the paper Sprockets with prongs and latches fit over holes in the edge of the paper

29. Paper loaded in cut sheet feeder Paper loaded in cut sheet feeder Bail holding paper against the platten Bail holding paper against the platten Lever set for cut sheet, friction feed

30. Print head Paper Ink ribbon Tractor Electrical signals cause pins to move out toward the ribbon Electrical signals cause pins to move out toward the ribbon Electrical signals from microprocessor Electrical signals from microprocessor Coils Pins

31. Paper feeds straight through the same side up from cut sheet feeder at the top to the output tray at the lower front Ink cartridges with integrated print heads Separate black and color cartridges; color cartridge contains reservoirs for cyan, magenta, and yellow

32. Print head and reservoir Print head and reservoir Ink is sprayed onto the paper Ink is sprayed onto the paper Paper Rollers Print head nozzle detail Print head nozzle detail Resistor creates heat that vaporizes some of the ink from the reservoir Resistor creates heat that vaporizes some of the ink from the reservoir Melted ink is forced out to spray against the paper; each droplet is about one one-millionth of a normal drop

33. Output tray IR port Laser cartridge LocalTalk port Type B parallel port Type C parallel port Input trays

34. Toner supply Paper EP drum Corona wire charging the drum Laser Fusing unit uses heat and pressure to adhere toner to paper Fusing unit uses heat and pressure to adhere toner to paper Corona wires charging the paper

35. Printer TypeDescription Dot matrix Forms images using a set of pins that strike an inked ribbon. InkjetForms images by spraying ink on the paper. Laser Forms images on paper by using a laser beam and an electrophotographic drum. Solid inkUses ink from melted solid-ink sticks. Dye sublimation Uses a thermal process to transfer dye to paper to create images. Thermo autochrome Uses special paper that has cyan, magenta, and yellow layers. Thermal waxUses plastic films covered with colored wax.

36. Application User prints document 1 1 GDI Calls printer driver 2 2 Print driver Renders job 3 3 Client-side spooler Returns control to application 4 4 Server-side spooler Inserts job into print stream 5 5 Print router Which print server? 6 6

37. Separator page processor Spools job and locates print processor 7A Completes rendering 7B Inserts separator page 7C Communicates with printer 7D Produces output 7E Printer Print processor Local print provider Port monitor To NetWare To Windows Remote print provider 8 8

38.  Nothing will print from any application.  Printer doesn’t print the way the user expects it to.  User can’t access network printer.  Printer prints part of a document then prints garbage for the rest of the document.

39.  Horizontal lines appear in the print so parts of characters are missing.  Flecks and smudges on the paper.  Poor print quality.  Continuous-feed paper jams.

40.  Poor print quality.  No output; paper passes through printer but is blank.  Fuzzy output.

41.  Smeared output or output rubs off the paper.  Low-quality image.  Repeating horizontal lines or white spaces.  Repeating vertical lines or white spaces.

42.  A clean environment prolongs the life and usability of most equipment, including printers.  Relative humidity of 50 to 60 percent is good for computer equipment.

45. USB connector Touch sensor panel