Does not respond to screen commands?

Does not respond to screen commands?

"TomTom One left in car 4 days in excessive heat. I tried resetting it and got the same response. When I hooked up the TomTom to my MAC, the TomTom ask if I wanted to connect to a computer? I taped 'YES' and the screen never changes. Can this TomTom be fixed? Thanks for your time, Kurt"