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Well yesterday I was charging my phone when it was on low battery and it fell and the charger broke inside the lightning port and now it’s not charging or turning on, I know it’s not the screen because I replaced it today, is the lightning port thing broken or what else?

Well if your cable broke inside your lightning port dock then it may have damaged it To replace the lightning port on an iPhone 7 is not aneasy of job The logic board itself has to be removed Apple makes it so easy ?? iPhone 7 Lightning Connector Assembly Replacement