Hi there and welcome
What exactly happens when you try to turn the Tablet on? Do any screens come up at all?
Please let me know
Sorry I was not online when you replied.
Can you do the following please
Remove the charger cable and hold the power button down for 60 seconds then release.
Then connect the charger and wait 15 minutes.
Then try to power it on.
Does it then come on and operate correctly?