I have 4 laptops Lenovo now with Windows 10 and whatever updates I put on them, their screen keep staying black one in a while when they wake up from sleep.
I use to hold the power button for 10 seconds, until I discover that doing a VNC connection to them and going to Screen Properties was the solution... but what a pain.
What I have discovered is that by plugin a second screen, in the Monitor Properties, it says "Display only on monitor 2"... as soon as I change that to "Extend" my screen opens-up.
Of course: Lenovo Suport is pure crap... they didn't even tried to diagnose the problem: the 1st line person (which looked more like a phone dispatcher) instantly concluded to "Hardware defect" and wanted to give me an RMA .... for my 4 laptops.... (geez I miss Dell sometimes but I love Lenovo X1 Tablets).
Of course I am not returning this laptop since it clearly looks like a software problem