techno sparks 8c after fixing screen it's just keep on on/off automati

I did have screen damage ink display,my phone is techno sparks 8c , now after fixing screen it's just keep on on/off automatically,any possible solutions to my phone problem?

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crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0