Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
Lets try the following.. If this doesnt get the unit to shut off, let me know.
If that doesnt work, try holding down just the power button for 1 minute solid. If neither step will get it to shut off, let me know.
Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.
Hello again, I never heard back from you after you viewed my response. Did you still need help with this issue?
if so, please respond. Otherwise please click and submit a 5 star rating so we can mark this issue as closed / resolved.