Same problem. One night there was an update and the next morning, everything stops working. This is clearly a firmware problem. Have tried everything there is on all known websites in reference to this problem. Type cover is just dead. And the notion of Microsoft to suggest a wipe and reinstall is simply irresponsible. Paid a premium price for this, and learned my lesson. Productivity loss and time spent to rectify is just crazy!. Switching to a new device and not turning back.
Many are holding on to this as it is not something cheap and affordable that we could just throw and get a new one. I understand the pain that others are facing.
From Malaysia.