MacBook Pro won’t start
My Mac book won’t start. Tried holding power button 5+ seconds, but no sign of power. Suggestions?
MacBook Pro 16″, macOS 15.3
Apple's guidance for "no start" and "doesn't start all the way" is here:
If your Mac doesn't turn on - Apple Support
If your Mac doesn't start up all the way - Apple Support
For the "no start" situation, it is advised to hold the power button for 10 seconds to force a shut down if the computer might still be in the ON state.
All guidance ends with this: ❝ If your Mac still doesn’t turn on, it might need service.