Oh ok. Then next to the blue coil there should be white coil Is that one in its place Also conect the iphone to itunes that also sometimes gets it back up n runing Also check the signal antena there little silver pins that go between the loud speaker and the frame if they r broken ur signal is weak
If it is 4s Right next to the connectors of the lcd/digitizer to right is you wifi atena covered by a metal cover check if it's connected properly If it's a4 it's a different problem
