Can a TomTom Toyota Aygo Connect Multimedia device be repaired?

aygoowner Registered Users Posts: 1
Apprentice Seeker
My wife has just bought a Toyota Aygo (2010/11 model) which has a built in TomTom sat nav unit.
The device switches on and displays the data collection start up screen but the screen does not respond to being touched at all.
I have been through the various TomTom advice screens (including connection to TomTom Home). I have also rebooted the device several times, including after charging it overnight (having seen the "charge for at least 2 hours" advice). Nothing makes any difference, the unit is still frozen on that screen.
A couple of questions therefore:
1. Is a repair possible and would it cost much?
2. Am I better off investigating removing the mount completely and using an alternative, stand-alone device?