单项选择题
A. Too much thermal paste was used on the processor and it is preventing boot.
B. The motherboard needs to have its PWD jumper removed before the first boot.
C. The motherboard needs to have the most recent BIOS version installed.
D. The motherboard needs to have a newer CMOS chip installed.
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?（）
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?（）