5.4 Given a scenario, troubleshoot video, projector, & display issues Flashcards
What should you check if no image is displayed on the monitor?
- If monitor is connected
- Monitor is not in standby mode
Use monitor controls to adjust image, select correct data source. Ensure monitor is set to the right input channel (e.g., HDMI). On-screen display menus are navigated using monitor buttons. Adjust settings like brightness, color, and power saving.
What are intermittent projetor shutdowns usually caused by?
overheating or loose connections
Check that the rojector’s fan is working, that the vents are free from dust & are not obstructed, & that the ambient temperature is not too high.
How to fix dim image video issues?
Check the device’s brightness & contrast controls
They may be all the way down
Power-saving mode may dim the display. Adaptive brightness or eye-saving features could be enabled, adjusting based on time of day or ambient light. If the image is barely visible, the display’s backlight may have failed.
When does an image look fuzzy?
If PC resolution doesn’t match the monitor’s native resolution
I.e. if your monitor’s native resolution is 1920x1080, but the video card is set to 1024x768, the image won’t be clear
What causes an image to look fuzzy?
Faulty or improperly configured video card driver
How to fix a fuzzy image?
Change output resolution in OS or update video card driver
What may cause a screen to flash/flicker?
- Loose connections
- failing backlight/circuitry
- Faulty/overheating video card
How to fix a fixed pixel?
A pixel stuck on a color (not black)
Use software utility to cycle pixel color states
i.e. you can you PixelHealer to fix a FIXED pixel (not a DEAD one)
Dead pixels (solid black) cannot usually be fixed
How does a burn-in occur?
When a static image is displayed for a long period
Displaying it for that long damages the monitor’s picture elements, & a ghost image is “burned” permenantly onto the display
What devices are more vulnerable to burn-ins?
Plasma screens & OLED displays
Always ensure that a display is set to turn off, or use an animated screen saver when no user input is detecte
What Windows tool can be used to assist in color calibration?
Color management applet in Control Panel
What is a common cause of purple/green horizontal lines on a display?
Faulty/loose connectors or poor-quality cabling
if fixing this doesnt resolve the issue, the issue might be a hardware fualt in the monitor or graphics adapter
What to check if your having speaker audio issues?
- Power
- Cable connectors
- Volume controls
(on the speakers)
If those are fine, use the OS to verify that the audio is set to the correct device & check the OS volume control
