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j'ai besoin d aide

hier soire je fait une mise a jour logicielle sur mon lg f70

Je demare l'instalation et peu de temp apres l'ecran devien vert et des messages d'erreur apparaissent

boot certify verify

secure booting error

cause:boot certyfication verify


Et donc plus moyen d allumer le telephone et il n'est plus reconu comme telephone mais bien comme peripherique usb

Que faire?reset sortie d usine?

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