I had the white bars on the screen too. Same problem. As well, the touch screen was not working. I had to redo the reconnect 3 times and still had the white bars. I decided to accept this tragic faith and live with the white bars for the rest of the iPhone life... But then. a miracle happened, the white bars mysteriously disappeared after a few hours, gradually, as if it needed to warm up to resets itself. Not sure how to explain but worth trying before you throw your phone away. Good luck.
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