Hello and welcome to justanswer, My name is ***** ***** i will be assisting you today,
I'm sorry about the issue, please make sure that is fully charged, try to use another charger or another battery, if the problem persists please try this : Unplug the power cord. Press and Hold the power button and the Volume Down button together and hold them for 10-15 seconds. You should see a little shape in the middle of the screen so just press and release the Volume Down button again and let it reboot. See if this fix up your problem.
let me the results please
has everything worked out, do you still need help please?