单项选择题
A. The hinge on the display panel is damaged.
B. The display cable is loose or damaged.
C. The display panel is defective.
D. The video controller on the system board is defective.
单项选择题 A user needs a laptop keyboard replaced because the space bar is not working. Mike, a technician, replaces the keyboard, and notices that a diagonal set of keys will not respond. Which of the following is the MOST likely cause?（）
单项选择题 A technician has a laptop that is running slow and notices the fan is on high. Which of the following should the technician try FIRST?（）
单项选择题 A technician is installing a parallel PCI card. Which of the following is the IEEE standard for parallel?（）