单选题After opening up the lid of a laptop that is powered on, nothing is displayed on the LCD. Opening and closing the lid multiple times usually causes the display to regain the signal. Which of the following components should the technician check FIRST?（）AMotherboardBVideo cardCCutoff switchDAC adapter
单选题
After opening up the lid of a laptop that is powered on, nothing is displayed on the LCD. Opening and closing the lid multiple times usually causes the display to regain the signal. Which of the following components should the technician check FIRST?（）
A
Motherboard
B
Video card
C
Cutoff switch
D
AC adapter
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