start with opening it again and checking all the connections. it probably will be just loose connector.

There is a small metal clip underneath the battery connection. Make sure you installed it and didn't lose it. If you did install it make sure it is well centered and not touching the motherboard. I had the same problem and was able to fix it by centering that small clip.

could you be more specific in which parts or connectors are?? i have the same problem but mine appear when i change the screen for the 2nd time, the first time everything worked ok

check the antenna that is connected to the charging dock, also use a degreaser such as windex. Put light windex on a microfiber cloth make it very damp and gently rub it along the charging port front side where the metal prongs are and also rub it along the inside of the metal frame along the right and left edges.

I am experiencing a similar issue after replacing my lcd, i am not having issues with service or reception but i can not connect to wif. Any idea where the wifi antenna may be located?

the wifi antena is the cable that is right next to the battery connection

Im really confused I've tried every and the blue inductor is still on the board and the small clip is clicked in idk what to do ????

http://www.ifixit.com/Answers/View/37807... is a post that I made last night that will help you guys resolve the problem. its an easy fix