TomTom 920 Touch Screen not responding

When I connect my TomTom to a pc and am asked if I would like to connect , the touch screen doesn't respond.

When I switch on my TomTom and I am asked if I agree to the terms , my Touch Screen doesn't respond.

I have tried using an SD card to use instead of the internal memory but the results are the same .

Any ideas how to get the touch screen working again ?

My device info is :

ttgo.bif:
DeviceName=TomTom GO 920
DeviceVersionHW=GO 920
DeviceSerialNumber=M8xxxxxxxxxx
BootLoaderVersion=55279
ApplicationVersionVersionNumber=9510
ApplicationVersion=1234792.1
CurrentMap=United_Kingdom_and_Republic_of_Ireland_960_7056
CurrentMapVersion=960.7056

Map(s):
C:\Users\GLM\Desktop\Internal Memory TomTom\United_Kingdom_and_Republic_of_Ireland_960_7056\

Storage:
Size 113875MB, Free 39295MB

hello
try reboot,hold on/off button for 30-sec untill the drums roll.
or the reset pin.
good luck

Thanks for the reply but holding on/off button until drum roll made no diference

is it completely unresponsive or is doing the phantom touch ,in which the screen starts to do diferent things like some one has touched it ,
in this case the digitizer might need to be changed if the soft reset hasnt helped .
you can try connecting it to the tomtom home and try controlling it from there and see if it works