Solve my problem why does automatic turn off screen of my phone

Feb 2, 2018
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My phone is galaxy j7 2015 why does my phone screen aotomatic turn off after that it cant be operate and i had to went at mechanic but no one can solve my problem.
 
Solution
In Apps>Settings>Display there will be an option to choose when the screen turns off to save battery use. Adjust that to a long time or never and see if that helps.