I have had/am having similar problems. Two problems, in fact. In the first, Windows 10 Pro would crash as if the screen ti,med out and powered down. Computer would remain on, but there woul;d be no way to get display up again. I would have to do a hard reset. After lots of trial and error, it seems that the Start10 service is the culprit. Since it has been disabled, I have not suffered any more crashes of this type.
I have also had the problems described above when stating Windows. Many times startup would freeze at the Windows logo. After doing hard resets for several times, I am able eventually to get a complete startup. It's hard to see how Start10 could cause this, but it is interesting that Howiemb and I have had such similar experiences.
Tom Whedbee