5.4 Troubleshooting Video Issues Flashcards
List the five cables that carry digital signals.
- HDMI
- DisplayPort
- Thunderbolt
- DVI-D
- DVI-I
Give five possible cable issues.
- Broken cable
- Cables not properly inserted
- Cheap cable
- Incorrect data source selected
- HDMI device issue
Which three cables carry digital signals and sound?
HDMI, DisplayPort, and Thunderbolt
What does high-bandwidth digital content protection (HDCP) do?
Protects the audio and video signals between the systems over HDMI and DisplayPort.
What is the approximate lifespan of a projector bulb?
500-2000 hours
How can you protect the life of the bulb?
Use gloves when handling
Give three possible projector issues.
- Dim images
- No images
- Shut down or restart
Give five possible video quality issues.
- Dim images
- Fuzzy images
- Flashing screens
- Dead pixels
- Burn-in
When does burn-in occur and how could you prevent this?
Burn-in occurs when the same static picture is displayed on screen for a long time. You could prevent this by having an animated screensaver and making sure not to leave the screen on the same page for several hours.
What screen types are the most and least susceptible to burn-in?
Most: LCD
Least: OLED
When does a fuzzy image occur?
When the output resolution from the computer is lower than the resolution of the screen.
What does a flashing screen mean?
The cable is not properly connected
How do you fix a dead pixel?
You can’t.
What does colour depth/bit depth refer to?
How many unique colours are available in an image’s colour palette in terms of bits.
When does dim image occur?
When there is no brightness or colour contrast control set for displays.
