After running Tomtom on it for the first time the touch screen stopped working after a few minutes and I had to reboot. I Changed voices and turned off Poi's etc. but it still froze so I booted up with out running Tomtom but it did the same again. After another reboot I recalibrated the screen which had no effect.
So after another reboot I tried to run the Document repair utility (Second Pic) and the touch screen stopped working altogether.
I have tried several resets and reboots and left it powered down over night but I cant get the touch screen to work again. When I touch the screen the unit beeps and for some strange reason the motorized front moves in and out and sometimes switches modes but won't acknowledged button presses etc. So it's probably a calibration issue maybe?
Everything else works on the device and I can access all the modes but unfortunately in the GPS mode I need the touchscreen to navigate the menu so I am stuck.
I have the same problem, although I am using IGO and my system looks different, my touchscreen is frozen on the GPS menu. Even after I reinstalled wince6 from the SDCARD, the touchscreen doesn't work (on the white calibration screen there's just the crosshairs in the middle). It looks like your system uses wince5, you can see if the wince5 others have posted in the threads works for you.
Although the other functions have touchscreen working, I think it might be hardware issue with the GPS board interfacing with the touchscreen, since WINCE6 only uses the GPS menu system. The other functions I think are run by another system/OS.