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I replaced my charge port/phone jack which now both work fine. However my earphone speaker and rear-facing camera no longer function. Any idea what I might have damaged or what I need to check for better connection?
Those two components are on two separate flexes so there is not much commonality between them other than the fact that you had to disconnect them to do the repair. I suggest that you go back through this guide to double check your work. Look for poorly seated connectors, damage to the connectors or debris that could impede a proper connection.