12.2.4 Practice Questions

You have a mobile device that provides a touchscreen, but does not have touchscreen technology embedded into the display. Which of the following mobile device display components provides the touchscreen functionality? answer -Inverter -LCD -OLED -Digitizer

-Digitizer Explanation If a touchscreen is not embedded into the display during manufacturing, a thin glass digitizer is placed in front of the display to read touch events. An inverter converts DC power to AC power for the screen. OLED and LCD are types of mobile device displays. They do not provide touchscreen technology.

Which of the following LCD display technologies is the BEST choice for use on touchscreen displays? answer -Vertical alignment (VA) -Twisted nematic (TN) -Touch screen digitizer (TSD) -In-plane switching (IPS)

-In-plane switching (IPS)

Which of the following mobile device display components provides the required power for a mobile device's screen? answer -Inverter -IPS -TN -Digitizer

-Inverter Explanation LCD monitors are backlit. In order to produce a bright enough light, an inverter is included on the laptop's motherboard (or may be part of the display). The inverter converts DC power to AC power for the screen. If a touchscreen is not embedded into a mobile device display during manufacturing, a thin glass digitizer is placed in front of the display to read touch events. The digitizer does not provide any power to a mobile device screen. Both TN (twisted nematic) and IPS (in-plane switching) are types of LCD technologies. They do not provide any power to a mobile device screen.

You have recently purchased a new, foldable smart phone. Which of the following types of mobile device display technologies is MOST likely being used for the foldable display? answer -OLED -IPS -VA -TN

-OLED Explanation OLED is taking over, and many devices that use LCD are transitioning to OLED. OLED is thinner and lighter than LCD and can be made flexible, allowing for the development of foldable smartphones. TN (twisted nematic), VA (vertical alignment), and IPS (in-plane switching) are all types of LCD technologies. They do not allow flexible folding of a mobile device display.

You have ordered and are about to replace an LCD screen on a laptop device. You have already placed the laptop on a static mat, attached a static wristband, and unplugged the laptop. What is your next step in replacing the LCD screen? answer -Remove the video ribbon. -Remove the battery. -Remove the screen. -Remove the bezel.

-Remove the battery. Explanation After you place the laptop on a static mat, attach the static wristband to your wrist, and unplug the laptop, you should then remove the battery. After removing the battery, you can then remove the bezel, the screen, and the video ribbon.

Your older notebook LCD display often goes dim or sometimes blank. Which of the following would be the BEST first step to resolve this issue? answer -Replace the LCD screen display. -Tighten down the bezel screws. -Replace the CCFL inverter. -Reconnect the video ribbon.

-Replace the CCFL inverter.

Which of the following are advantages of using an OEM replacement LCD display? (Select two.)

-The LCD display is guaranteed to work as a replacement. -The LCD display is the same quality as the screen you are replacing.

You have recently been given an older laptop to use for performing basic tasks such as sending emails and editing documents. However, when the display changes from one color to another, you notice that there is some distortion in the image. Which of the following LCD technology types is MOST likely being used for the LCD display? answer -Twisted nematic (TN) -Vertical alignment (VA) -Organic light-emitting diode (OLED) -In-plane switching (IPS)

-Vertical alignment (VA)

Which of the following mobile device components are often installed under the bezel of a mobile device display? (Select three.) answer -OEM -Wi-Fi antenna wires -Microphone -Touchscreen digitizer -Inverter -OLED -Webcam

-Webcam -Wi-Fi antenna wires -Microphone Explanation Manufacturers often use the display bezel to run wires for the Wi-Fi antenna or to integrate a webcam or microphone. The touchscreen digitizer is placed in front of the mobile device display to read touchscreen events. An inverter converts DC power to AC power for the screen. The inverter may be included in the device's motherboard or be part of the display. OLED is a type of display, not a component that is installed under the bezel. OEM stands for original equipment manufacturer and is often referred to when deciding on whether or not to purchase replacement parts for a mobile device display.

You are removing the bezel from a laptop's LCD display screen. After several attempts to pry up the bezel and remove it, you have not separated the bezel from the case. Which of the following is the MOST likely reason for your inability to remove the bezel? answer -You missed a screw. -The bezel is glued in place. -You have been using a metal tool to pry up the -bezel. -The bezel is not designed to be removed.

-You missed a screw. Explanation If you reach a point where the bezel will not separate, you have probably missed a screw. Bezels are attached with screws and are designed to be removed for internal replacement purposes. If the bezel is glued in place, it means that it has been tampered with. While using a metal tool to pry up the bezel can scratch or damage it, you can still do so if you feel it is important enough.