オリジナル投稿者： Minho ,
Ideally, you have to try a known-good FCAM flex. Small parts can be hit or miss, especially for something as new as an iPhone 7. If you don't have access to a known-good part, then the logic board needs to be verified to try and eliminate something. What's probably happening is that one of those elements (CAM/PROX/ALS) of the circuit is defective. Once the flex is connected, it may be drawing too much current and forcing the some other power rails into current limiting mode. This will have to be looked at by a micro-solderer.