My MacBook Air won’t start
My MacBook Air won’t start even in safe mood
MacBook Air 13″, macOS 11.6
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Hi,
If your Mac doesn't turn on - Apple Support
If it doesn't help, you'd better make Genius Bar reservation if your local retail Apple Store is open or find opened local Apple Authorized Service Provider to be examined your MacBook Air there.
https://www.apple.com/retail/geniusbar/
Apple - Find Locations - Location Selector