Chosen Solution

Hi everyone. Today I got a second hand iPhone 6S, It was listed as “battery and front camera not working” I changed the battery. It made the phone turn on Then I check the camera. As described it’s not working. So I replace the front sensors assembly. And now it’s still not working. I even tried swapping the entire screen and sensors with one from another 6S’s. At one point of unplugging and checking the connection, I reconnected the cameras and the battery, then turned on the phone, and it worked ! But then I screwed back everything in place, it stop working again. I suspect a faulty connection but what do you think ? Thanks

Sounds like a bad connection to me. Look carefully at the FPC connectors on both the logic board and the ribbon cable and look for any bent or missing pins. If the connectors look good make sure they make a good solid connection when you plug it in again. Hope this helps!