crwdns2934241:0crwdne2934241:0 Nigel Craft

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won't boot up, frozen start screen .

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when first turned on or plugged into chargr the phone starts up and freezes on model  of phone while displaying the message " Set Warranty Bit: recovery"

How or what do i need to do to try fix this myself  please...

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Samsung Galaxy J5 (2016)

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open