How can I recover my MacBook screen

Sorry if this has been asked, but I have a MacBook Pro early 2015 with the retina display. I always connect to a Samsung external display to work at a time.

For some reason, this time, I turned on my Mac (unrelated to monitor) heard the startup sound and there is no screen... However, when I plug the external monitor, it seems that changed the monitor main, but without the option of a second screen in display preferences.

things to note:

1. my MacBook monitor is not on at all

2. my cursor doesn't move anywhere other than my screen to the external monitor

3. in the display preferences, there is no option 'Show the arrangement' on an external-monitor as pictured below

Have you tried resetting the NVRAM? How to reset the NVRAM on your Mac - Apple Support

Tags: Notebooks

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