MacBook Air
When turning on my laptop, What does a blinking file with a question mark in it mean?
MacBook Pro 13″, macOS 10.13
Question marked as
Hi,
it means your MacBook Air can't find macOS to boot.
Resetting NVRAM could solve the problem.
https://support.apple.com/en-us/HT204063
If it doesn't help, try to boot in Recovery mode then run Disk First Aid of DiskUtility.
https://support.apple.com/en-us/HT201314
