Hello @dave-e1,
Welcome, thanks for posting.
I am sorry for the issue with your Hub.
Can you please do the following:
Turn the power switch off on the back of the Hub.
Ensure the Hub is upright, in a well-ventilated location and out of direct sunlight, if possible
Switch the hub back on at the power. The Hub should now operate normally.
If the Hub does not boot up or boots back up let me know.
Many thanks,