Surface Pro 2 will not start Windows

My Surface Pro 2 suddenly will not start Windows 10. Only Surface logo will appear on screen for several seconds and then go black. A couple of times "Preparing automatic repair" appeared at the bottom but nothing happened. Obviosly I don't know that much about tablets. I am not sure if my dettachable keyboard is connected because no response to any of the F keys. Anything I can do? Thanks.
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