1 If the black lines aren't visible on the external screen, the laptop screen may need to be replaced. 2  If the black lines are also visible on the external screen, the video card or motherboard may need to be replaced. 3  In some cases, a loose video card can cause problems with the monitor video.
1. segmentation - (embryology) the repeated division of a fertilised ovum. cleavage. embryology-the branch of biology that studies the formation and early development of living organisms. cell division, cellular division-the process in reproduction and growth by which a cell divides to form daughter cells.
1 As a result of segmentation; a process by which some physical digestion occurs in the small intestine, the chime sloshes back and forth between segments of the small intestine that form when bands of circular muscle briefly contract.2  A helpful animation that outlines the process of peristalsis and segmentation. This image illustrates the segmentation of the chyme that occurs within the small intestine of the digestive tract. 2  Segmentation is the process of mixing the food contents in the digestive tract to create a more uniform mixture throughout.