Hi there and welcome
Can you remove the charger, then hold the power button down for 60 seconds and release.
Then connect the charger, wait 5 minutes then try to start it.
Let me know the results please
Sorry, it was many weeks till your replied John and I was not online.
Can you power off the Tablet, then hold the volume UP and Power until you get to a menu.
Tell me if you can get to this menu please.
It is the internal mainboard that has faulted.
A corrupted firmware can cause this. But we have ruled this out by trying to reinstall it.
I am really sorry about this and you are going to have to return the tablet to have it replaced. It will be covered by the warranty if this has not expired, and the replacement will be done at no cost to you.
I am really sorry about this, and if you have problems, or would like any additional information or assistance, please do not hesitate to let me know.
And if you can take a second to rate my service, that would be greatly appreciated.