Try to hard reset holding power button and home button for 10sec, if it is not working check the lcd and lcd connector whether damaged or not, if lcd damaged needed to replace and if connector needed to do micro soldering
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Try to hard reset holding power button and home button till it turn on, if it is not working check the lcd and lcd connector whether damaged or not, if lcd damaged needed to replace and if connector needed to do micro soldering
Try to hard reset holding power button and home button for 10sec, if it is not working check the lcd and lcd connector whether damaged or not, if lcd damaged needed to replace and if connector needed to do micro soldering