TOMTOM GO 600 locked, no connection to computer?

chodder007 Registered Users Posts: 15
Apprentice Seeker
hi my Tom Tom 600 is showing a connection to a computer and the tom tom screen showing an exclamation mark? I have tried to update it through Mydrive but it's just looping like its not connected to the PC, I have tried 3 different cables to connect, help much appreciated thank you