If an external monitor is attached to a laptop and it does not work， which of the following actions should a technician take FIRST？（）A、Re-install the operating system.B、Open and close the cover.C、Use the function key to activate the monitor.D、Install new software for the keyboard.
If an external monitor is attached to a laptop and it does not work， which of the following actions should a technician take FIRST？（）
- A、Re-install the operating system.
- B、Open and close the cover.
- C、Use the function key to activate the monitor.
- D、Install new software for the keyboard.
相关考题：
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