The question mark keeps flashing and does not respond to any inputs
I just get a flashing question mark and my MacBook does not accept any inputs
MacBook Air 13″, 12.4
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The flashing folder with question mark indicates that the Mac cannot locate a usable operating system.
You'll need to reinstall the OS by rebooting in Recovery mode.
Please see:
If your Mac doesn't start up all the way - Apple Support
and:
How to reinstall macOS - Apple Support