Somehow I broke one of the two springy contacts that connect the home button from the front assembly to the main/back. (You can see them in the upper left corner of the step 17 picture.) I've got it working again mostly, by soldering in a bit of metal to bridge the gap. Unfortunately it isn't springy so I'm not sure how long it will last. I guess I might be able to solder in some tiny wires to connect them, or maybe some different springs. Ugh. Great guide, wish I wasn't such a goof!
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