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.
Segmentation according to demography is based on variables such as age, gender, occupation and education level or according to perceived benefits which a product or service may provide.Benefits may be perceived differently depending on a consumer's stage in the life cycle.emographic segmentation divides markets into different life stage groups and allows for messages to be tailored accordingly. A variant of this approach known as firmographic or feature based segmentation is commonly used in business-to-business markets (itâs estimated that 81% of B2B marketers use this technique).