My screen is black

my screen is black ..when I press Home Key Or Volume up or down the SamSung signal appears of the screen and a small red written line in the upper of the screen ..how could I solve the problem ..I tried to reinstall the software but it wasn’t accepted by the phone..thanks so much

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jamal bennor "tried to reinstall the software but it wasn’t accepted" why not. What did it tell you?

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