Chosen Solution
My screen goes black once I answer the phone. If I touch the screen it turns back on the right back off. I can not hit the end button to end a phone call. Everything else works just fine. I have double checked that the flex cable for the sensor was not broke, tore or anything. I have cleaned the connectors, yet still have the same issue.
Check you have installed the square transparent plastic holder that houses the light sensor and remove any screen protectors. If that doesn’t work then try a new front camera ribbon.
