单项选择题 A laptop LCD screen needs to be replaced. Which of the following tools would be BEST used toopen the case?（）

单项选择题 A new processor was recently installed on a one year old motherboard, replacing the original processor. The processor is on the motherboard’s supported processor list and was double checked for proper installation. However, the PC refuses to POST properly and displays no video onscreen. Which of the following is the MOST likely issue?（）

单项选择题 A user states that the LCD display on their laptop has intermittent lines on the screen. The technician notices that when the display panel is moved, the line appears and then disappears. Which of the following is the MOST likely cause?（）