...................
Mine is still dead. I go through the various dances from time to time, and I live in hope with each firmware upgrade ... but I'm resigned to the fact its a goner :-(
The "various dances" seems to be the thing.
After having somehow magically restored my keyboard a couple or more months ago, and then never closing the cover when moving location (which isn't the point of a tablet...) so as not to jeopardise things, suddenly this evening it wouldn't light up.
I "did all the dances" to no avail.
Then on the notification board I noticed that rotation lock was "on", which was odd... On instinct I tapped "Tablet mode" on, and then off again, and suddenly the keyboard lit up!
I have no idea if it was just coincidence or not.
Anyway, my old HP laptop which was dead is now back in use - I put in a new hard disk and installed Ubuntu, and will use that as my 'home' computer now.
I've recently retired and now rarely take a computer when travelling, but I will buy a cheap tablet for journeys where I want to access entertainment, etc.
I've worked out how to 'speak' to my mobile phone, so I dictate texts, emails, etc. to it now, when I'm out and about.
My Surface actually has an extended warranty which is still in force, but at the moment I don't have the energy to do attempt replacing it. If I feel up to it later this year I'll follow it up...