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Hi my 4th screen change on apple phones but followed videos. The screen isn’t lighting up. When powering it does the iPhone bong. The screen must be on as it has been in emergency sos and I could hear the key tones but no display I’ve tried the old but think removing it’s buggered tried another screen and reconnecting the connectors many times any ideas have I bugger it up

did you disconnect the battery before replacing the screen, if you did then shine a light on the screen to check if you have image