I am from far northern CA and my VZW GS5 had never experienced this problem until I came to SF, (and after I installed the s view smart cover).
First the battery was running absurdly hot and charge level was dropping 10%/hr. So i did a battery pull and turned off mobile data and hoped it was just finding new towers or whatever after the trip. Returned to normal temp.
Next day I had removed the s view cover (just as I had presumed its nothing but a hindrance to use of the phone, which is already next to impossible to use one handed/quickly/on the road to change a song).
However I had noticed the screen having issues when the s view cover was on, for the first 24hrs it was a novelty and worked fine. Of course that didn't last. It began to take too long to come on or not come on at all after opening the cover. So I took it off for the day and used my spigen low profile plastic case.
Go out for the day and pull the phone from my pocket, aaand more failure. Now my screen wont turn on just like all you guys are experiencing.
I already erased all of tasker, all of secure settings, due to the last time the phone started screwing up, and now I have erased Apex launcher which again fixed the problem temporarily. I then tried the S-View case again last nite, lo and behold, same screen issues.
Battery pull has fixed it temporarily, while my overpriced S-view case has been angrily thrown across the room (waste of $40).
So now in true android fashion I am going to start turing off every feature that i bought this phone, for one by one, in order to figure out which one is making my $700 paperweight not turn on.
Not gonna lie, I sure miss the simplicity of my always working iphone at the moment.