CompTIA A+ Cert Master 5.4 Hardware and Network Troubleshooting Study

What might a loud "pop" sound indicate when using a digital video projector?

A burned out bulb

An old desktop computer has an office projector currently connected to it. A colleague brought in a modern low-profile laptop for the upcoming presentation and connected the office projector to the laptop. Unfortunately, a loud "pop" sound occurs, and the projector emits no light. How can desktop support troubleshoot the issue so the meeting can continue as usual?

Change the light bulb.

A user brings in a device that has an unusually dim display. Prescribe steps to check for the cause of the dim display. (Select all that apply.)

Check for adaptive brightness settings. Check brightness and contrast controls. Check for failing backlight.

Which of the following issues is generally unfixable?

Dead pixels

A professor is presenting to the class with a digital video projector that shuts down intermittently. Prescribe steps to diagnose the issue. (Select all that apply.)

Check for loose cables. Check that fans are working and vents are unobstructed. Check that the bulb is secured tightly.

A user reports that the display is not showing an image. The display is a 4K resolution monitor connected via HDMI to a desktop PC. Prescribe steps for diagnosing the issue. (Select all that apply.)

Check if the cable rates for 4K video. Substitute with a known good cable. Try the monitor with another PC.

What issue might a failing backlight cause?

Dim image on display

A user reported an issue with the monitor displaying the company's logo on the bottom left corner of the screen. Even when viewing different application windows or full-screen videos, the logo remained faintly displayed on the corner of the monitor. What would desktop support need to do to resolve this display issue?

Change the customer's monitor with a new monitor.

An office user tries to display a PowerPoint presentation using a digital light processing (DLP) projector and a laptop, but no video is displayed. Next, the user attempts to connect the DLP projector to a desktop workstation with the same result. In both cases, the user connected the projector with a high-definition multimedia interface (HDMI) cable. How would a technician troubleshoot the display issues in both of these cases? (Select all that apply.)

Check if the data source is selected correctly. Check that the HDMI cable is working with other displays. Check if the bulb is working.

A user is reporting a loss of audio on his desktop PC. The PC uses wired speakers with a 3.5mm jack. Prescribe steps for diagnosing the audio issue. (Select all that apply.)

Check the power and volume on the speakers. Check the volume in the OS. Check the 3.5mm cable connection.

A digital art studio has requested support in calibrating the displays of their new graphics workstations. Describe how the support technician can perform this calibration in Windows 10.

Color Management applet in Control Panel The Control Panel's Color Management applet can establish a color profile and ensure that the display matches it.

Select the types of video cable that are capable of delivering a combined video and audio signal. (Select all that apply.)

DisplayPort If the video card supports it, DisplayPort can offer a mixed graphics and audio stream. HDMI A high-definition multimedia interface (HDMI) can output a mixed visual and audio signal by default if the video card supports it.

Describe methods for avoiding burn-in on TFT, LED, and OLED displays. (Select all that apply.)

Power off the display when not in use. Use a screensaver.

What are some possible reasons a digital video projector may not be displaying an image? (Select all that apply.)

Faulty or unsecured cables Overheating Burned-out bulbs

A user is experiencing color glitches on an LED monitor, such as colored lines and colors changing unexpectedly. Diagnose possible causes of the issue. (Select all that apply.)

Incorrect color calibration Faulty or insufficient cabling

A user is experiencing color glitches on an LED monitor, such as colored lines and colors changing unexpectedly. Diagnose possible causes of the issue. (Select all that apply.)

Incorrect color calibration Color calibration is the process of adjusting screen and scanner settings to balance color input and output. Faulty or insufficient cabling Color glitches, such as purple or green horizontal lines or colors shifting suddenly, may be encountered by users. Typical causes may be a defective or loose connection, or cabling is either faulty or of inadequate quality for the desired image resolution.

Describe symptoms that might cause a failing display or faulty video display cable to occur. (Select all that apply.)

Lines or bands Flickering image Bright spots

Describe symptoms that might indicate a projector bulb has burned out. (Select all that apply.)

Observing scorch marks inside the bulb Seeing a broken filament inside the bulb Hearing a "pop" sound

A user submits a support ticket for a work PC that has a display with a fuzzy image. Select the possible cause of the fuzzy image on the display.

Output resolution does not match the display's native resolution. The picture will appear fuzzy if the output resolution does not match the native resolution of the display device. Use the operating system (OS) to change the output resolution.

As a teacher gives a presentation to a class, the digital video projector shuts down intermittently. What is the most common cause of intermittent projector shutdown issues?

Overheating

Which display issue can a computer technician often fix by using a software utility to cycle through extreme color gradients?

Stuck pixels A digital display panel may have stuck (constantly bright) pixels. There are software programs available that can cycle the pixel through a variety of rather severe color states to revive it.

A customer tried to turn up the volume to the desktop speakers without success. Desktop support arrived and found that the workstation only had the high-definition multimedia interface (HDMI) cable plugged into the monitor with a built-in soundbar. The office workstations do not come with 3.5 mm cables for audio as a baseline. How can desktop support explain the solution for this case to the customer?

The audio must be set to output to the monitor's soundbar.

Desktop support tried to troubleshoot an audio issue and found that the workstation only had the high-definition multimedia interface (HDMI) cable plugged in. As a result, the customer using the workstation could not get the sound to work through the external speakers, although the monitor has a built-in speaker bar. In addition, the baseline workstation in the office does not come with 3.5 mm cables for audio. How would desktop support explain the solution to the customer?

The audio must be set to output to the monitor's soundbar.

A user is using a faulty HDMI cable. Describe possible symptoms the user may experience. (Select all that apply.)

Unexpected color changes Colored lines or bands

Describe potential fixes to a display with a fuzzy image. (Select all that apply.)

Update the display driver. Change the output resolution.

A user submits a support ticket. The user is experiencing a lack of audio signal to the display. The user's computer has a display with built-in audio and a DVI cable connected to a fully-updated Windows PC. Diagnose the lack of audio.

Using an incorrect cable type

A user says that the monitor does not display a picture. The display is a 4K resolution monitor linked to a desktop PC using VGA. Diagnose the problem.

Wrong cable type