I just wanted to take a moment to thank everyone who contributed something--software, instructions, videos, whatever--to this fix. After about a month of frustration, I found this thread. I read over everything here, and several other places, several times before I overcame my trepidation and decided to give this a shot.
It took almost no time at all, it was incredibly easy with the instructions provided, and my phone now functions perfectly. In fact, it's better in just about every other way outside of the issues I sought to repair.
Anyway, again, thanks to everyone who had a hand in any part of this. You're all amazing.