Why do I have time to refresh the screen will flash black, were

Title, such as desktop, e-mail, the screen will refresh
came a black bar, about the width of a point to refer to the two
is my LG W1942C LCD 19, bought a new
Dylan 3850 graphics cards, ASUS motherboard P5QL PRO
display is not my problem ah?
My screen test, no abnormal ah

set to look at the points raised frequency set to try elsewhere.desktop, for example, c, etc…
disc set only if the “message” of the problem, it should be a software conflict, and

Display has nothing to do otherwise try reinstalling graphics drivers to see if there is not a driver problem

not work on another computer reload, or if there are problems after the heavy equipment, as long as they can send ..To repair a right-click the desktop – Properties – set up in the 24-bit color to true color or higher in high-level, in the screen refresh rate to 70-80