I had already done that but did no solve the problem. The cable end near camera/LED/microphone module seems to be soldered. I need to know where the other end is connected to mother board or some other module to reset that connection. I am pretty sure that this is some loose connection somewhere as the camera detection as well LED flickers as I move the screen. However, the microphone has always been working fine even when the camera is not detected.
Can someone advise where the other end of the ribbon cable is connected?