everything is working fine except from the home button

Under the button you see a spring. Sorry don't have a picture right here. The button only shorts this spring so the two gets contact. Try (very carefully since it can easily break) to lift up the spring so it is easier to short it. I remember I had the same problem and the spring was broken so I had to lift up what was left so it came in contact with the button. Don't remember if there are two springs but you see what the button is supposed to make contact with. Hope it helps!