10.3.5 Practice Questions

The contrast on your projector's output is not displaying properly. In addition, the images continually flicker. What is the MOST likely cause of the projector's display problems?

> A bulb is close to burning out. Explanation: A bulb on the verge of burning out can cause a projector's screen contrast to display incorrectly and induce flickering. An incorrect cable would not be the source of contrast and flickering problems. An outdated projector driver could cause the projector to not display anything at all. However, it would not cause contrast or flickering problems. High-definition files that are not in sync with audio files would not cause contrast or flickering problems.

You have purchased a 1600 x 1200 LCD monitor and connected it to the DVI-I port on your computer using a DVI-D cable. You configure the screen resolution at 1280 x 1024 with 24-bit color. The display output seems to be fuzzy and stretched. Which of the following BEST describes the action you should take to correct the problem?

> Change the screen resolution to the native resolution of the monitor. Explanation: LCD monitors have a native display resolution. The native display of this monitor is 1600 x 1200. While it is possible to set the resolution lower than the native display, you should use the native display setting for the clearest picture. Using a DVI-D cable is the same as using a DVI-I cable; both will give you digital output. Using a DVI-A cable could result in lower quality images, as you will be using an analog signal. Increasing the color depth increases the number of colors that the monitor displays.

You have purchased an LED monitor and connected it to the DVI-I port on your computer using a DVI-D cable. You configure the screen resolution to 1440 x 900 with 32-bit color. The display on the screen seems to be pixilated. Which of the following solutions is MOST likely to fix this problem?

> Change the screen resolution to the native resolution of the monitor. Explanation: LED and LCD monitors have a native display resolution. You should set the resolution of the video board to the native resolution of the monitor (whatever it might be). While it is possible to set a resolution other than the native resolution, the images on the display will be distorted or pixelated. DVI-D and DVI-I cables are compatible; both carry digital output to the monitor. DVI-A cables are incompatible with DVI-D or DVI-I hardware because they use an analog signal. Changing the color depth increases the number of colors that the monitor displays.

A customer complains that a recently purchased monitor no longer displays a picture. You verify that the monitor is powered on and that the video cable is securely fastened to the video port. Which of the following actions is the BEST to take next?

> Check the brightness and contrast settings using the monitor's controls. Explanation: It's not uncommon for a monitor's brightness or contrast controls to be accidentally turned down. Check the brightness and contrast on the monitor to see if this has any effect on the problem. When troubleshooting, be sure to check the obvious things first before taking more serious actions, such as returning the monitor to the manufacturer. Moving the video card or reloading the video driver is unlikely to resolve the customer's problem in this scenario.

You have just installed a new video card in a user's Windows workstation. When the system is powered on, the screen displays in 16 colors at 640 x 480 resolution. Which of the following will BEST resolve this problem?

> Download and install the latest driver from the video card manufacturer's website. Explanation: You should download the latest video driver from the manufacturer's website. Because Windows didn't have the right driver, it used a generic VGA or SVGA driver instead. Rebooting in Safe Mode will result in a display using the basic VGA video driver. Verifying that the system's UEFI firmware is compatible with the video card will not solve the issue of displaying in 16 colors at 640 x 480 resolution. The sync rate is associated with the physical speed that a router (or modem) communicates.

Which of the following projector issues would MOST likely be caused by poor air flow through dirty vents in the projector?

> Intermittent shutdowns Explanation: Intermittent shutdowns can happen when sensors are triggered. Poor air circulation from dirty vents could cause the temperature to rise and trigger the temperature sensor to shut down the projector. Fuzzy images on the display could be the result of improper resolution settings or problems with the LCD panels, not ventilation issues. A dim display could be the result of a bad inverter or a bulb that is wearing out, not a ventilation issue. The audio and video being out of sync would not be caused by a ventilation problem.

After using your LCD monitor for about three months, you notice a small black dot in one area of the screen. Regardless of what is shown on the monitor, the dot remains the same color and in the same location. Which of the following is the BEST method for removing the black dot from the monitor?

> Play a video designed to fix dead pixels. Explanation: When working with LCD monitors, a pixel that is stuck is in an On state and is shown on the monitor as a white dot. A black dot is a dead pixel that is stuck in an Off state. If the dead pixel is not permanently damaged, it can usually be fixed using any of the options mentioned (except buying a new monitor, which does not actually fix the problem). However, the BEST method is to run a video designed to fix dead pixels, which you can purchase or download online. Screen-fixing videos play a random combination of red, green, and blue hues at a rate of up to 60 flashes per second in an attempt to jar the stuck pixel back into its usual cycle. The other methods could void the warranty and cause additional dead spots. Buying a new monitor is a last resort, as it is the most expensive option.

You recently upgraded a client's older workstation to Windows 11. The client has called to complain that the interface is very slow. For example, after clicking on the Start button, the Start menu slowly appears on the screen. Which of the following will MOST likely fix this problem without requiring a hardware upgrade?

> Set the visual effects for best performance. Explanation: You should adjust the visual effects for best performance. This will disable animation, shading, and fading effects used by Windows. Doing so reduces the load on the older hardware in the client's system and should increase the user interface's performance. However, the best solution to this problem would be to install a newer video adapter in the system. Changing the resolution setting changes the size of text and windows in relation to the screen. Changing the color depth affects the number of colors that can be displayed at one time. Increasing the video acceleration settings increases the amount of processing done by the video card, not the CPU.

For several years, your laptop's monitor has worked perfectly. However, shortly after turning on your laptop today, you notice that the dimness has increased on the screen. Which of the following is the MOST likely cause? (Select two.)

> The monitor's inverter has gone bad. > The power adapter was accidently unplugged. Explanation: A dim image on an LCD monitor is usually caused by a misconfigured brightness setting, an automatic power-saving mode, or a malfunctioning backlight. If your laptop suddenly dims, first check to verify that the power adapter hasn't been accidently disconnected. Most laptops automatically dim the screen brightness when they run low on battery to minimize power usage. Since you know that you haven't changed the brightness settings, it is very unlikely that these settings would be changed automatically. Therefore, the dimness could be caused by a failed compact fluorescent light (CLF) or inverter. These two items provide the backlight for LCD monitors. If you're tech-savvy, you may be able to replace the bad component yourself. Otherwise, you will need to get a professional to fix or replace the monitor. You didn't make any changes to the monitor's settings (brightness level, hertz rate, resolution), but even if you had, changing a setting such as the hertz rate would not affect the display brightness. In addition, changing to the default brightness level would not result in a dim display.

Your projector is displaying the colors on the screen incorrectly. What is the MOST likely reason for this problem?

> The source computer's resolution settings do not match the projector's resolution settings. Explanation: When the source computer's resolution settings do not match the projector's resolution settings, it can cause incorrect colors to display. Outdated drivers often result in a projector failing to display anything at all. A triggered filter sensor would likely result in a shutdown. A VGA cable would not cause the wrong colors to be displayed.