Chosen Solution
I have tried follow all instruction from all the forums about this problem but still didn’t fixed. I stared thinking it might be got to do with the hardware. I really feeling frustrated, spent many hours trying to fix this problems. Can anyone please help if you know or have same problem and already fixed! Thank you!
Review this IFIXIT guide: MacBook Air 13" Mid 2013 Logic Board Replacement. Follow the first 3 steps then jump down to Step 22 to make sure the camera cable is inserted correctly and the cable its self is not damaged. If you have any questions take a good tight picture of the connectors or cable and post them in your question (edit mode) so we can see.