Battery, mobile phone software, hardware will cause this failure to turn on.
It is recommended that you try the following:
1, replace a mobile phone battery of the same model for testing or send the battery to the nearest service center for testing
2, take out the battery, clean the battery metal contact with a rubber test.
3, take out the SIM card and SD card at the same time, and then press the power button for more than 10 seconds to test whether it can be turned on.
If it still cannot be turned on, there may be a problem with the system program or hardware, it is recommended that you send your mobile phone to the nearest service center for testing