My Surface Pro would not turn on after leaving it for a few days while I went on holidays. Tried everything. It still will not turn on.

Left it for dead for 1 month. Thought I would give it another try. I charged it up.

It worked!

I believe the problem is 'hibernation'. MS has traditional problem with 'hibernation'. So I guess when the Surface Pro finally ran out of battery power and the unit turned off by itself from hibernation.

I have since disabled hibernation and it has worked for the last year without a problem.