Hello, I am Oumar Originally from West Africa I live in USA about 3/1 years now I always love to fix things but didn't know how to until I read the famous: The Unauthorized Guide to iPhone, iPad, and iPod Repair by Warner, Timothy L. everything changed in my life after that plus the book was connected with IFIXIT so there I am on IFIXIT.
I am here to learn more, and discover more.
Answer to "Black screen after battery replacement"Hello, Try to do soft reset or (reboot) Power Button+ Home Button for 10s and see. You won't lose any data.
Answer to "Why is the LCD screen replacement not working?"Hi Carly, Sorry for this incident that happened to hopefully you will get this back very soon. Let me ask you this what made think the problem was the LCD default? Try this: Remove the battery ( if it is removable) press Up volume button + Power button + Home button at the same time, for 10 seconds then put it back (the battery) and see what comes up. If nothing happens do it with the battery inside. hope that would help.