Part of Lesson 7 - Objective 4.3

Question 1

List the probable causes and possible solutions:

Display has power but no image on screen

Answer 1

Probable Causes:

• The video cable is loose or damaged
• The computer is not sending a video signal to the external display

Possible Solutions:

• Reconnect or replace the video cable
• Use the Fn key along with the multi-purpose key to toggle to the external display

Question 2

List the probable causes and possible solutions:

Display is flickering

Answer 2

Probable Causes:

• Images on the screen are not refreshing fast enough
• The display inverter is damaged or malfunctioning

Possible Solutions:

• Adjust the screen refresh rate
• Disassemble the display unit and replace the inverter

Question 3

List the probable causes and possible solutions:

The image on the display looks dim

Answer 3

Probable Causes:
-The LCD backlight is not properly adjusted

Possible Solutions:

• Check documentation for calibrating LCD backlight
• Properly adjust LCD backlight

Question 4

List the probable causes and possible solutions:

Pixels on the screen are dead or not generating colour

Answer 4

Probable Causes:
-Power to the pixels has been cut off

Possible Solutions:
-Contact the manufacturer

Question 5

List the probable causes and possible solutions:

The image on the screen appears to flash light or patterns of different colour and size (artifacts)

Answer 5

Probable Causes:

• The display is not properly connected
• The GPU is overheating
• The GPU is faulty or malfunctioning

Possible Solutions:

• Disassemble the display to check the connections
• Disassemble and clean the computer, check for dust and debris
• Replace the GPU

Question 6

List the probable causes and possible solutions:

Colour patterns on the screen are incorrect

Answer 6

Probable Causes:

• The display is not properly connected
• The GPU is overheating
• The GPU is faulty or malfunctioning

Possible Solutions:

Question 7

List the probable causes and possible solutions:

Answer 7

Probable Causes:

Possible Solutions:

Question 8

List the probable causes and possible solutions:

Answer 8

Probable Causes:

Possible Solutions:

Question 9

List the probable causes and possible solutions:

Answer 9

Probable Causes:

Possible Solutions:

Question 10

List the probable causes and possible solutions:

Answer 10

Probable Causes:

Possible Solutions:

Question 11

List the probable causes and possible solutions:

Answer 11

Probable Causes:

Possible Solutions:

Question 12

List the probable causes and possible solutions:

Answer 12

Probable Causes:

Possible Solutions:

Question 13

List the probable causes and possible solutions:

Answer 13

Probable Causes:

Possible Solutions: