I finally got the bl00dy thing going!
Unbelievably, if you slightly bend the Surface in whilst holding the power key down it will start up. It takes a few goes, but it stayed on long enough on one occasion for me to go to settings and select NEVER SLEEP.
Microsoft, you are a disgrace, you wanted nearly £500 for a replacement, I'll never buy a Microsoft product again, you are no better than a snake oil salesman. Your silence on this issue is shameful.
THIS WORKED FOR ME!!! My 2 yr old Surface Pro 3 would not start today. Never happened before. After trying everything, and being totally frustrated and ready to toss the thing out the window, I read this advice about 'slightly bending' it and it worked! Bent the upper left corner down while pushing the start button. It took 10-15 tries. Ridiculous that Microsoft, among the richest companies in the world, make such crap.
ME TOO
You are great
And Microsoft a sh.
They asked me 690€ to send the Pro 3 4 years old to Germany and change by a pro 4