Your customer is using Windows Vista and complains about the quality of picture he is getting on his
monitor. You find that you cannot adjust the refresh rate or the resolution. What is the most likely
cause?

A.
The video card is not recognized by Windows.

B.
The monitor is not compatible with the video card.

C.
The video card has failed.

D.
The video card does not have enough video RAM.

Explanation:

When Windows does not recognize the video card, it gives a set of simplified default settings for
refresh rate, resolution, etc.
Answer option B is incorrect. As long as the monitor can plug into the card, it is compatible.
Answer option C is incorrect. If the video card had failed, there would have been no picture at all on
the monitor screen.
Answer option D is incorrect. Lack of sufficient video RAM would just prevent certain graphics from
being displayed.
Reference: http://www.technibble.com/troubleshooting-video-cards-problems-and-solutions/