原帖由： Rany ,
I would try a complete assembly from a working phone, if available. In other words, try with a known good complete assembly. Sometimes new ones are bad too like mentioned by others here. Also make sure you are connecting it in the correct orientation. Finally, connect the front cam assembly without plugging the home button extension cable onto the board, see if that changes anything. Only if using a known good assembly in the correct orientation yields the same result, can you then conclude that you have a board level problem. Note: continuous boot looping may cause data corruption. Pull a back-up before testing any further.