Hi Andrew. Welcome to justanswer.
While the phone is still plugged with the charger, press and hold the Volume down and power button for 10-15 seconds and see if it responds or not.
Hi, just checking in. How did things turn out?
Are you getting any blinking notification lights on your phone?
Do you get anything on the screen when you plug it?
Hi Andrew, just checking in. How did things turn out?
Then there is a fault in the battery circuitry of the phone. There is open circuit sue to which the phone is not getting the voltage and current to operate. How old is your phone?