? Mother board damage

I have been helping a friend try to fix his iPhone 6s Plus. He dropped it and the forward camera stopped working. He tried Replacing it with a new screen with a new camera and the camera still didn't work. To make matters worse he said he was touching the connector cables and it sparked. Now the screen starts off bright then the colours go beige after about ten seconds. I am thinking the mother board is damaged. I was wondering if any of these repairs to the board would be easy or if it would be a microsoldering job? I am thinking micro soldering....