Troubleshooting Video Issues

Question 1

What are the types of physical cables that carry digital signals?

Answer 1

• HDMI
• DisplayPort
• Thunderbolt
• DVI-D
• DVI-I

These cables are essential for transmitting audio and video signals in digital format.

Question 2

What should you check if a cable is not functioning properly?

Answer 2

Check both ends of the cable are properly connected

Ensuring proper connections can resolve many common issues with signal transmission.

Question 3

What type of cable is recommended for higher bandwidth?

Answer 3

Use high-speed rated HDMI cable

This is important for supporting high-definition audio and video signals.

Question 4

Which cables do not carry sound?

Answer 4

• VGA
• DVI

Unlike HDMI, DisplayPort, and Thunderbolt, these cables only transmit video signals.

Question 5

What is High-Bandwidth Digital Content Protection (HDCP)?

Answer 5

Protects the audio and video signals between the systems over HDMI and DisplayPort

HDCP is crucial for preventing unauthorized copying of digital content.

Question 6

What are common projector issues?

Answer 6

• Dim images
• No images
• Shut down or restart
• Burned-out bulb

These issues can significantly affect the usability of a projector.

Question 7

What is the lifespan of a projector bulb?

Answer 7

About 500-2000 hours

Regular replacement is necessary to maintain image quality.

Question 8

How should you handle a projector bulb to protect its life?

Answer 8

Use gloves

This prevents oil and dirt from damaging the bulb.

Question 9

What should you do before removing a projector bulb?

Answer 9

Cool down the projector for 15 to 30 minutes

This is important for safety and to avoid burns.

Question 10

What causes dim images in displays?

Answer 10

No brightness or color contrast control set

Adjusting these settings can improve image quality.

Question 11

What causes fuzzy images?

Answer 11

Output resolution from the computer is lower

Ensuring the correct resolution is crucial for clarity.

Question 12

What does a flashing screen indicate?

Answer 12

The cable is not properly connected

This can often be fixed by re-seating the cable connections.

Question 13

What are dead pixels?

Answer 13

There is no fix for a dead pixel

These are permanent issues that can occur on display screens.

Question 14

What is burn-in?

Answer 14

Occurs when the same static picture is displayed on a screen for a long time

Using animated screensavers can help prevent this issue.

Question 15

What does ‘Color Bit’ refer to?

Answer 15

Actual number of colors displayed

Higher color bit values allow for more color variations.

Question 16

What is the color variation for an 8-bit color palette?

Answer 16

256 color variations

This is the most basic color depth used in displays.

Question 17

What is the color variation for a 16-bit color palette?

Answer 17

32,768 color variations

This allows for more detailed images than 8-bit.

Question 18

What is the color variation for a 24-bit color palette?

Answer 18

16,777,216 color variations

Also known as true color display.

Question 19

What is the color variation for a 32-bit color palette?

Answer 19

1B color variations

This is referred to as deep color display, allowing for even more detail.

Question 20

What are examples of color spaces?

Answer 20

• Adobe RGB
• sRGB IEC
• Display P3

These color spaces are used in various applications for accurate color representation.