iPad 4 Logic Board Schematic - Backlight CircuitsWith the understanding the the complete schematic would be illegal to post, I'd like to see if someone could post a picture o...
Answer to: SLEEP WAKE AND HOME buttons not workingYou likely damaged some small chips on the logic board when you took the battery out. It's actually a common problem. If you search for jessabethany, she can do the repairs. There are actually quite of few of us on here that have done it, but she is one of a few that provides a reasonable repair service to fix it. Unless you have ultra micro soldering skills, I would highly discourage trying the repair yourself.