Here are some steps you can try to troubleshoot the problem:
1. Check the power source: Make sure your MacBook Pro is connected to a power source and the battery is charged. If the battery is low, try charging it for at least 30 minutes before turning it on again.
2. Reset the SMC: Resetting the System Management Controller (SMC) can help resolve some power-related issues. To reset the SMC on a MacBook Pro with a non-removable battery, follow these steps:
- Shut down your MacBook Pro.
- Hold down the Shift + Control + Option keys and the power button at the same time for 10 seconds.
- Release all keys and the power button, then press the power button to turn on your MacBook Pro.
3. Reset the PRAM/NVRAM: Resetting the Parameter RAM (PRAM) or Non-Volatile Random-Access Memory (NVRAM) can help resolve issues related to hardware settings. To reset the PRAM/NVRAM, follow these steps:
- Turn off your MacBook Pro.
- Press the power button, then immediately press and hold the Command + Option + P + R keys.
- Hold down the keys until your MacBook Pro restarts and you hear the startup sound twice.
- Release the keys and let your MacBook Pro start up normally.
4. Check the display brightness: Press the F1 key to increase the brightness of your MacBook Pro's display.
5. Connect an external display: If your MacBook Pro displays an image on an external display, it could be a problem with the built-in display. In this case, you may need to take your MacBook Pro to an authorized service provider for repair.
If none of these steps resolve the issue, it is recommended to take your MacBook Pro to an authorized service provider for further diagnosis and repair.