Help my MacBook Air doesn't open

Please help me I press my MacBook Air power button  and it doesn't show me the apple logo it show me a file and a planet and after that my screen get dark and it says no bootable disc insert boot disk and press any key please help me the last time   I it opened successfully please help me

Restart the computer and hold down the "option" key.
When startup disk selection window opens up select the startup disk.
Usually it is "Macintosh HD" unless you changed the name.
You can navigate by using tab key and selecting by pressing the return key.
Best.

Similar Messages

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    Hello, and welcome to Apple Support Communities!
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    https://support.apple.com/en-us/HT201541
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    Hi netaanya,
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