单项选择题 Older video cards used S-video to output to a TV. This standard has been replaced by:（）

单项选择题 A user reports poor picture quality with a laptop connected to an LCD. Which of the followingshould the technician check FIRST for optimal picture quality?（）

单项选择题 When a power supply does not meet minimum requirements for a motherboard, which of thefollowing can happen?（）