Someone posted this on the Tomtom Forum this evening.
Laborious but he cracked it.
"After many hours I have "fixed" my Go Live 1005
This is how -
As stated in this thread, when the satav boots it seems to check the map file before launching the application, If the map has errors it does not boot. Mine was "hanging" on the startup picture when booting then after 3-5 minutes it re-booted and hung again, which all points to a faulty map file.
The computer would not connect to the satnav at all.
I found that if i tapped the screen with my finger after switching on the satnav it distracted the software from the map checking and the Tomtom application booted, but unfortunately it hung and after a while it rebooted again.
I also found that if the computer was plugged in and running My Drive Connect it connected to the satnav briefly until the satnav rebooted. It connected long enough to initiate the download of the new map from Tomtom to the PC.
I then I waited untill the map was on the PC and followed the above procedure to allow the PC to connect to the satnav. After a few connections by the PC it deleted the old, faulty map on the satnav, probably with the intention of then updating it but the satnav re-booted (as usual) but this time when it rebooted it reported that there was NO MAP !! and asked to be connected to the PC to download one.
At that point it transferred the new map from the pc and installed it and all is well.
This procedure is all down to timing and patience but it worked for me.
In a nutshell, distract the software on booting so it launches the application.
As it only last a few minutes before rebooting, connect the PC and download the map.
Wait until the map is on the PC before booting and distracting the satnav again, keep doing this until My Drive Connect has deleted the faulty file and then the satnav will run software to reinstall the downloaded map."
Worth a try if you have the patience or the time. Load a Mapzone not the same map if you crack it.