TomTom Go 300 freezes?

Hi. When turning on my TomTom Go 300 it plays the signature drum beat, shows the first red hand screen, then goes to the visual dipicting a screen and appears to load showing a yellow bar progressing across the bottom of the screen, it then goes to the screen showing the logo and words tomtom GO in the upper left of the screen with an outlined finger pressing the front of a TomTom unit. At this point it freezes.

I've, reset, deleted and reloaded, reformatted, in fact everything recommended on the TomTom web site. Nothing will get me past this screen. All started going wrong when I loaded speed camara info into the TomTom.