I have a Go 1005 Satnav. I recently updated the maps and then left it in the car as usual. When I next came to use it, it no longer worked. It switches on, starts up for a few seconds then the screen goes grey (it freezes) , then black and it restarts (without the drumroll). This pattern then keeps on repeating about every 30 seconds. I tried keeping it indoors for a week in case it was damp, I connected it to the computer to get the latest updates etc. Is it broken and ready to be chucked or is there something I can do? Any suggestions welcome.