HI guys

I wasn't sure where to post this but all of a sudden The settings screen stopped working on my NOKIA 808 Pureview. Nothing has changed. I've tried resetting, removing battery and restarting, Belle cleanup. The settings screen pops up but when I try to access anything,nothing happens then after about 30 seconds it disappears back to the home screen.

This has never happened before and I am at a loss of what to do apart from a HARD reset. Anyone have any ideas????