you may need to hard reset it if that doesn't work permanently, factory reset may be you're last option . when the red words come on the screen you can scroll down to reset . good luck . mine has stopped . turned off things that turn on my screen so when in my pocket not to hit a bunch of times and set it off again .
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I have had this too on my s9 today and yesterday . I just got it yesterday too :-( my self I didn't see this dite yet and , well , I couldn't if I tried anyway. Locked out . Lol. I was holding buttons down somehow got it shut down. Pulled my sim card . Waited a bit ( 5-10 minutes) turned it back on and it had stopped . The second time I wasn't so lucky . Haha I tapped the power off button b4 the blue box was there , then the second time while the blue box was on "power off "..thenp it sent me to the pattern . I waited until it went through it then did the pattern a few times and it shut down again . Turned it back on and it was there .again .Got it shut down again trying to do the same thing i did before ..Waited the 10 minutes then powered up. Fixed . . .my "talk" everything has and is shut off so I hope it doesn't happen again. One thing I noticed that I might have done was hold and push randomly the buttons on the phone while using the flashlight. I have no idea what or how long I pushed any of the buttons / volume/ power / and or probably the third key was involved too(?) . I have no idea if that caused my issue but I'm going to keep an eye out if it happens again and watch my fingers on the buttons .. oh and sometimes when things have been going for a bit it'll have a blue line across the entire screen going up and down, full screen swipes like a scan bar kinda thing .. and that'll sit doing that until I push something . Then the boxes start again . If that sounds familiar. Luckily I've gotten mine back and running too .
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