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I recently changed the screen on my iphone 6s plus, but because the screen was smashed I couldnt turn the phone off before disconnecting the battery. Now the phonw wont turn back on and doesnt look like its even charging. Please help.
As long as you disconnected the battery connector before the other connectors you could not have caused any damage. Check the battery connector is seated properly. · Does iTunes recognise the phone? · Have you tried installing back the old screen to check?