I just replaced my battery as well and noticed after I was done the home button no longer worked. Everything went fine as far as taking it apart.
I've replaced many parts on iPhones on all gens and never had a problem.
I did touch the two pins together to test the home button but nothing at all happens. I even put back the original battery but still nothing. I metered the contacts on the home button on the LCD and it shorts fine. Both pins are good but again even shorting them directly does nothing any help would be great, thanks
Btw power buttons and everything else work fine it's just the home button.