Guys

I appreciate this is a fairly old post but after searching for an answer to my current problem I seem to of stumbled upon the answer. Mine is a similar problem to the blue screen in the pictures, however after a short while the sat-nav unit re-boots and ever thing seem ok for a while. Then it decides to just keep freezing and resetting itself. I've up graded from v31 to v32 and then back again but nothing seem to work. do I assume I also need to buy a new Mk IV sat-nav unit.

Thanks in advance