Please tell us some basic information before asking for help:
Model Name: Asus zenfone max pro m1
Rooted or not: not
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
After trying to re-lock the boot my phone became black and its not showing any indication.