When troubleshooting video, keep in mind that the problem might be with the video card, the monitor, or in software settings. One good place to start in troubleshooting the video is to adjust the hardware screen settings such as brightness, contrast, or screen size. The following table lists several common video problems.
|System does not boot||Newer systems must have a video card and a monitor connected in order to boot. If the system does not boot and the screen is blank, check the monitor connection.|
|Colors not correct
Colors are not smooth
|Incorrect display of colors is often caused by low color depth settings or capabilities of the video card.
|Blurry images, strange color tints||This problem is often caused by a weak or corrupt signal from the video card.
|Image doesn't fill the screen, image skewed, image cut off||Use the monitor settings to change the horizontal and vertical sizes and image geometry settings.|
|Program or system lockup, system crashes, slow video performance||Software or system problems can be caused by incorrect video settings, especially for programs that have high video demands. To correct the problem:
|Screen flickers or appears wavy, user reports headaches||Correct these problems by increasing the refresh rate setting for the video card.
|Scrambled or distorted images, blank screen, high-pitched tone||These problems could occur if the monitor is not capable of handling the output from the video card. This problem can be temporarily addressed by lowering settings in Windows Display Properties. However, upgrading the monitor is the only way to really fix the problem.|
|Image does not display on a second monitor||For problems with dual-monitor systems:
|Slow performance when drawing screens||By default, Windows automatically adjusts visual effects based on system performance. You can manually modify the types of effects used to optimize how Windows looks and performs.
|Video files or DVD video does not play, audio plays but no video||Digital video can be saved in one of several file formats (called codecs). Before you can play a video file, your computer must have the corresponding codecs installed. Many video files actually use two codecs: one for video and one for audio. If the audio plays but the video does not, you have the correct audio codec but need the video codec installed.|
Note: If you change the video settings in the operating system and then the monitor is unreadable or blank, reboot into Safe Mode, adjust the video settings, then reboot.