My 6" TomTom GO, connected to the cylindrical car power socket, has been fine, but all of a sudden has started going blank and having to be resuscitated by pressing the power button. In one case, it refused to be resuscitated, and I kept getting the start-up page with the white line, which, once it was complete, would start all over again. Thankfully, I was close to where I wanted to go, so I could navigate myself there, but if I'd been somewhere strange, I'd have been in a real pickle. It seems to be behaving itself again, but my trust in it has gone. How long before the next problem? Connection problem or device problem? Advice welcome!