My surface will not switch on. I was watching a live stream of the test cricket last week, when the screen effectively froze. The stream was still working, but I couldn't get off of full screen, either by switching tab or pressing the windows home button. So I decided to switch it off and switch it back on again. However after I had switched it off, when I went to switch it back on again all I got was the surface start screen, and it would stay there doing nothing. I have tried holding down for ten seconds and switching back on and pressing down with the volume button at the same time with no luck. So any help would be greatly appreciated in the attempt to get it working properly again thanks in advance