Chosen Solution
I’ve taken it apart, and put it back together many times, sometimes I’ll get the phone working, but still not have a responsive home & power button
Sounds like classic pry damage to me. You can order the components for the pry damage area from Alibaba and give it a DIY try, or send it out for straightforward microsoldering job. Read all about classic iPhone 5 battery replacement pry damage here. Admin, feel free to delete if spammy. http://mendonipadrehab.com/entries/gener…
First check the chips underneath the battery connector, because they are responsible for the Power- and Homebutton. If one of the very small chips is brocken, the phone is useless.