This morning SP3 i7/8G/SSD 256 keyboard would not work. Restarted and it and has been stuck on screen with "Surface" written on it for 5 hours. Will turn off with a touch of the top button and comes on but does not boot up. Just goes to "Surface" screen. Had Wifi connection before restarting. Bought SP3 about 90 days ago and use it nearly all day with no issue to date.