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 something simple Tom.. If this doesnt work, or even if it does please respond and let me know.
Take the back cover off the phone and then remove the phones battery. Wait five seconds, then reconnect the battery and try to turn the phone on.
Will it turn on now?
Dustin S.Senior Technician and Network Switching Systems Operator / Maintainer.