The video processing section from the camera is faulty. So the Y signals are not processed with the video being split out., This can be a failure of the video processing IC which is a hardware issue. Since this a highly technical work , I would advice you to get help;
Before you proceed remove battery and keep aside till the charge subsides so as to reset the phone as a final attempt to see if this helps.
Answers & Comments
The video processing section from the camera is faulty. So the Y signals are not processed with the video being split out., This can be a failure of the video processing IC which is a hardware issue.
Since this a highly technical work , I would advice you to get help;
Before you proceed remove battery and keep aside till the charge subsides so as to reset the phone as a final attempt to see if this helps.