Apple Laptop Won't Turn On

How do I fix my Apple laptop that won't turn on?

If your Mac doesn't turn on

1. Press and hold the power button on your Mac for at least 10 seconds, then release. ...
2. If you see no change on your Mac, press and release the power button.
3. If your Mac now turns on but stops at some other screen during startup, follow the steps for when your Mac doesn't start up all the way.