When your MacBook is not turning on, it indicates you don't hear a startup chime, a spinning fan, or drive noise, and there are no visuals on your monitor. Your MacBook seems completely dead. You mentioned the charging signal is green which indicates your Mac is fully charged, so that verifies your battery is intact.
You can take the following methods to fix your MacBook won't turn on.
- Detach all external devices
- Reset SMC
- Perform a power cycle for Intel-based Macs
- Check the display brightness
If you have taken all the above actions but your MacBook still won't turn on, you'd better send your MacBook to the Apple Store or Apple Authorized Services Provider to ask for help. They will diagnose the issue and replace the dead or malfunctioning components for you.
