Troubleshooting Video Issues Lesson 003: Video Quality Issues Part 1

What does video quality issues encompass?

Dim images, fuzzy images, flashing screens, dead pixels, burn-in, and incorrect color display.

Why do dim images occur in a display?

There is no brightness or color contrast control set for the displays.

How is the issue of dim images fixed on monitors and TVs?

Use the onscreen display or the physical control buttons.

How is the issue of dim images fixed on projectors?

Increase the brightness and contrast.

Why do fuzzy images occur on a display?

The output resolution from the computer is lower than what the display can use.

What is the specific reason for fuzzy images when they occur for the most common reason?

The provided picture needs to be stretched across more pixels than intended.

How is the issue of fuzzy images on a display fixed?

Change the output resolution from the graphics card to match what the monitor expects.

What is important to keep in mind regarding display resolution?

Every type has its own defualt that it is designed to support.

What most commonly causes flashing screens?

The cable is not properly connected.

With what cable type is the video issue of a flashing screen seen?

When dealing with ones that transmit video using digital signals.

How is the issue of a flashing screen most commonly fixed?

Check the cable and ensure it’s properly seated.

How is the issue of a flashing screen most commonly fixed if the cable has already been checked?

Replace it with a known good one.

What does dead pixels in a display cause?

Picture elements no longer lighting up.

How does one troubleshoot a dead pixel?

Put the mouse cursor or something else that is supposed to be white over it to see if that is indeed the issue.

How is the issue of a dead pixel solved?

Replace the entire display.

What is burn-in?

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

How is the issue of burn-in solved?

Replace the entire display.

What types of displays are the most susceptible to burn-in?

Plasma screens or OLED displays.

How is burn-in prevented?

By having an animated screensaver or configure the display to turn off due to inactivity.