When sleepingmobile phoneThe power on state is charged with a power amplifier. When I woke up, it was turned off. The screen showed whether it was turned on or not, but it only appeared in this period of time. It hasn't been a year yet, and I don't know whether to take it for repair????
Try restoring the settings of your phone. Go to Phone Settings - More Settings - Restore Factory Settings to restore all settings. This operation will not clear the data.