(14 Sep 2015, 9:53 pm)Michael wrote Try and take the battery out and put it back in, that works for me.
I don't think I can remove the back cover to remove the battery so that's a pain.
Oh and it was on 52% battery when it froze, so it may take some time until it reaches 0%. To make it even more worrying for me it has frozen thinking I was trying to type the word "serious" which I really don't want to see when I've got this issue.