how can you fix a macbook air not booting up
we did try to press the power button and and pressed the caps lock key and it did not light up green
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I understand your Mac won't turn on at all. Pressing the Caps Lock key won't illuminate its LED, and from all outward appearances it might as well be dead.
Begin with If your Mac doesn't turn on.
Read and follow each of its steps, including all the links within it, all the way through and including Step 4, which directs you to:
If your Mac starts up to a blank screen
Read and follow each of it steps also, all the way through and including the end, which takes you to:
"If you still need help, please contact Apple Support."