4.5.4 Practice Questions Video Troubleshooting

Increase the colour depth. Explanation To solve colour shift problem, you need to increase the colour depth. The colour depth controls the number of colours that can be displayed on the screen at a time. The actual colours that are used on the screen is determined by the colour palette. The number of colours in the palette is dtermined by the colour depth. If the colour depth is low (such as 256 or 16,000), colours unavailable in the palette are shifted to the closest available colour. The screen resolution determines the size of the display area. Modern video adapters typically have more than enough memory to display the full colour palette.

Check the monitor's brightness and contrast settings using the controls on the monitor. Explanation It's not uncommon for a monitor's brightness or contrast controls to be accidentally turned down. Check the brightness and contrast on the monitor to see if it has any effect on the problem. When troubleshooting, be sure to check the obvious things first before taking more serious actions, such as returning the monitor to the manufacturer. Moving the video card or reloading the video driver is unlikely to resolve the customer's problem in this scenario.

Set the visual effects for best performance. Explanation You need to adjust the visual effects for best performance. This will disable animation, shading, and fading effects used by Windows. Doing so reduces the load on the older hardware used in the client's systems and should increase the performance of the user interface. However, the best resolution to this problem would be to install a newer video adapter in the system. Changing the resolution setting changes the size of text and windows in relation to the screen. Changing the colour depth affects the number of colours that can be displayed at one time. Increasing the video acceleration settings increases the amount of processing done by the video card instead of the CPU.

Download and install the latest driver from the video card manufacturer's website. Explanation You should download the latest video driver from the manufacturer's Website. Because Windows didn't have the right driver, it used a generic VGA or SVGA driver instead.

Change the screen resolution to the native resolution of the monitor. Explanation LED and LCD monitors have a native display resolution. You should set the resolution of the video board to the native resolution of the monitor (whatever it might be). While it might be possible to set the resolution other than the native resolution, the images on the display will be distorted or pixelated. DVI-D and DVI-I cables are compatible-- both carry digital output to the monitor. DVI-A cables are incompatible with DVI-D or DVI-I hardware because they use an analogue signal. Changing the colour depth increases the number of colours that the monitor displays.

Configure a screen saver on each system. Explanation Burn-in can happen when the same image is displayed on the screen for an extended period of time. The best way to prevent this from happening is to configure a screen saver on each system. Configuring the systems to automatically power off after 5 minutes of inactivity will also prevent burn-in, but will also make them very inconvenient to use. Increasing hardware acceleration settings will not prevent burn in from occurring. Installing a software utility on each system that is designed to fix stuck pixels can be used to repair a burnt-in display, but it will not prevent it from happening in the first place.

Set the display resolution to the native resolution of the monitor. Explanation LED and LCD monitors have a native display resolution. You should set the resolution of the video board to the native resolution of the monitor (whatever it might be). While it might be possible to set the resolution other than the native resolution, the images on the display will be distorted or pixilated. Changing connection types will not correct an incorrectly set display resolution, nor will increasing the hardware acceleration or installing an updated driver.

Set the display resolution to the native resolution of the monitor. Explanation LED and LCD monitors have a native display resolution. You should set the resolution of the video board to the native resolution of the monitor (whatever it might be). In this scenario, the display resolution has been set to a resolution that is much smaller than the native resolution, causing the images on the display to appear over-sized. Changing connection types will not correct an incorrectly set display resolution, nor will increasing the hardware acceleration or installing an updated driver.