Just an update regarding the problem!

I did disconnect the battery for 5 minutes this afternoon but that did not fix the problem.

When the scrolling goes slow you can just about make out the screen but think that is more the fact i am used to the menu screen from the old unit so know what each thing is. I managed to select the sat nav map when playing about and that came up pretty clear but still scrolling!!!???

Any help

Cheers again

Gav.