There’s a ? Blinking on my screen and want disappear

Hi there, it seems like that your Mac is starting up to a folder with a question mark. This means that either your startup disk is not available, or that your startup disk is not containing a working macOS operating system.

Please follow these instructions in order to get rid of the question mark

1. Press and hold the power button on your Mac for up to 10 seconds, until your Mac turns off.
2. Every Mac has a power button. On notebook computers that have Touch ID, press and hold Touch ID.
3. Use Disk Utility to repair your startup disk. Follow the steps for a Mac with an Intel processor.
4. If Disk Utility found no errors or repaired all errors, reinstall macOS.
5. If you still need help, please contact Apple Support.