If your model is the 2015 model, EMC on the bottom will be 2835 (you have selected late 2016), try reconnecting the trackpad cable. I have seen the trackpad cable go bad on these models, and if it is not recognised, neither the trackpad or the keyboard will work.
If you reconnect it and it initially works, buy a replacement cable. It will go bad again, so just replace it with a new one.