Hi [link|https://www.ifixit.com/User/4248466/Stephen+gutteridge|@gusa|new_window=true],
If you're having problems with the touchscreen (digitizer) in the device then the [link|https://www.ebay.com/itm/275179931793|touchscreen|new_window=true] will have to be replaced as it cannot be repaired. (supplier example only to show possible cost of the part)
Search online for ''TomTom Go Live 1005 digitizer'' to find suppliers that suit you best.
Here's a [https://www.youtube.com/watch?v=c4wJW1vSYaw|video] that may help.